diff --git a/examples/Pipfile.lock b/examples/Pipfile.lock
index e84a56b..935415f 100644
--- a/examples/Pipfile.lock
+++ b/examples/Pipfile.lock
@@ -16,55 +16,135 @@
         ]
     },
     "default": {
-        "appnope": {
-            "hashes": [
-                "sha256:5b26757dc6f79a3b7dc9fab95359328d5747fcb2409d331ea66d0272b90ab2a0",
-                "sha256:8b995ffe925347a2138d7ac0fe77155e4311a0ea6d6da4f5128fe4b3cbe5ed71"
-            ],
-            "markers": "sys_platform == 'darwin'",
-            "version": "==0.1.0"
+        "argon2-cffi": {
+            "hashes": [
+                "sha256:05a8ac07c7026542377e38389638a8a1e9b78f1cd8439cd7493b39f08dd75fbf",
+                "sha256:0bf066bc049332489bb2d75f69216416329d9dc65deee127152caeb16e5ce7d5",
+                "sha256:18dee20e25e4be86680b178b35ccfc5d495ebd5792cd00781548d50880fee5c5",
+                "sha256:36320372133a003374ef4275fbfce78b7ab581440dfca9f9471be3dd9a522428",
+                "sha256:392c3c2ef91d12da510cfb6f9bae52512a4552573a9e27600bdb800e05905d2b",
+                "sha256:3aa804c0e52f208973845e8b10c70d8957c9e5a666f702793256242e9167c4e0",
+                "sha256:57358570592c46c420300ec94f2ff3b32cbccd10d38bdc12dc6979c4a8484fbc",
+                "sha256:6678bb047373f52bcff02db8afab0d2a77d83bde61cfecea7c5c62e2335cb203",
+                "sha256:6ea92c980586931a816d61e4faf6c192b4abce89aa767ff6581e6ddc985ed003",
+                "sha256:77e909cc756ef81d6abb60524d259d959bab384832f0c651ed7dcb6e5ccdbb78",
+                "sha256:7d455c802727710e9dfa69b74ccaab04568386ca17b0ad36350b622cd34606fe",
+                "sha256:8282b84ceb46b5b75c3a882b28856b8cd7e647ac71995e71b6705ec06fc232c3",
+                "sha256:8a84934bd818e14a17943de8099d41160da4a336bcc699bb4c394bbb9b94bd32",
+                "sha256:9bee3212ba4f560af397b6d7146848c32a800652301843df06b9e8f68f0f7361",
+                "sha256:9dfd5197852530294ecb5795c97a823839258dfd5eb9420233c7cfedec2058f2",
+                "sha256:b160416adc0f012fb1f12588a5e6954889510f82f698e23ed4f4fa57f12a0647",
+                "sha256:b94042e5dcaa5d08cf104a54bfae614be502c6f44c9c89ad1535b2ebdaacbd4c",
+                "sha256:ba7209b608945b889457f949cc04c8e762bed4fe3fec88ae9a6b7765ae82e496",
+                "sha256:cc0e028b209a5483b6846053d5fd7165f460a1f14774d79e632e75e7ae64b82b",
+                "sha256:d8029b2d3e4b4cea770e9e5a0104dd8fa185c1724a0f01528ae4826a6d25f97d",
+                "sha256:da7f0445b71db6d3a72462e04f36544b0de871289b0bc8a7cc87c0f5ec7079fa",
+                "sha256:e2db6e85c057c16d0bd3b4d2b04f270a7467c147381e8fd73cbbe5bc719832be"
+            ],
+            "version": "==20.1.0"
+        },
+        "async-generator": {
+            "hashes": [
+                "sha256:01c7bf666359b4967d2cda0000cc2e4af16a0ae098cbffcb8472fb9e8ad6585b",
+                "sha256:6ebb3d106c12920aaae42ccb6f787ef5eefdcdd166ea3d628fa8476abe712144"
+            ],
+            "version": "==1.10"
         },
         "attrs": {
             "hashes": [
-                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
-                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
+                "sha256:149e90d6d8ac20db7a955ad60cf0e6881a3f20d37096140088356da6c716b0b1",
+                "sha256:ef6aaac3ca6cd92904cdd0d83f629a15f18053ec84e6432106f7a4d04ae4f5fb"
             ],
-            "version": "==19.3.0"
+            "version": "==21.2.0"
         },
         "backcall": {
             "hashes": [
-                "sha256:38ecd85be2c1e78f77fd91700c76e14667dc21e2713b63876c0eb901196e01e4",
-                "sha256:bbbf4b1e5cd2bdb08f915895b51081c041bac22394fdfcfdfbe9f14b77c08bf2"
+                "sha256:5cbdbf27be5e7cfadb448baf0aa95508f91f2bbc6c6437cd9cd06e2a4c215e1e",
+                "sha256:fbbce6a29f263178a1f7915c1940bde0ec2b2a967566fe1c65c1dfb7422bd255"
             ],
-            "version": "==0.1.0"
+            "version": "==0.2.0"
         },
         "bleach": {
             "hashes": [
-                "sha256:213336e49e102af26d9cde77dd2d0397afabc5a6bf2fed985dc35b5d1e285a16",
-                "sha256:3fdf7f77adcf649c9911387df51254b813185e32b2c6619f690b593a617e19fa"
+                "sha256:6123ddc1052673e52bab52cdc955bcb57a015264a1c57d37bea2f6b817af0125",
+                "sha256:98b3170739e5e83dd9dc19633f074727ad848cbedb6026708c8ac2d3b697a433"
             ],
-            "version": "==3.1.0"
+            "version": "==3.3.0"
         },
         "certifi": {
             "hashes": [
-                "sha256:e4f3620cfea4f83eedc95b24abd9cd56f3c4b146dd0177e83a21b4eb49e21e50",
-                "sha256:fd7c7c74727ddcf00e9acd26bba8da604ffec95bf1c2144e67aff7a8b50e6cef"
-            ],
-            "version": "==2019.9.11"
+                "sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee",
+                "sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8"
+            ],
+            "version": "==2021.5.30"
+        },
+        "cffi": {
+            "hashes": [
+                "sha256:005a36f41773e148deac64b08f233873a4d0c18b053d37da83f6af4d9087b813",
+                "sha256:04c468b622ed31d408fea2346bec5bbffba2cc44226302a0de1ade9f5ea3d373",
+                "sha256:06d7cd1abac2ffd92e65c0609661866709b4b2d82dd15f611e602b9b188b0b69",
+                "sha256:06db6321b7a68b2bd6df96d08a5adadc1fa0e8f419226e25b2a5fbf6ccc7350f",
+                "sha256:0857f0ae312d855239a55c81ef453ee8fd24136eaba8e87a2eceba644c0d4c06",
+                "sha256:0f861a89e0043afec2a51fd177a567005847973be86f709bbb044d7f42fc4e05",
+                "sha256:1071534bbbf8cbb31b498d5d9db0f274f2f7a865adca4ae429e147ba40f73dea",
+                "sha256:158d0d15119b4b7ff6b926536763dc0714313aa59e320ddf787502c70c4d4bee",
+                "sha256:1bf1ac1984eaa7675ca8d5745a8cb87ef7abecb5592178406e55858d411eadc0",
+                "sha256:1f436816fc868b098b0d63b8920de7d208c90a67212546d02f84fe78a9c26396",
+                "sha256:24a570cd11895b60829e941f2613a4f79df1a27344cbbb82164ef2e0116f09c7",
+                "sha256:24ec4ff2c5c0c8f9c6b87d5bb53555bf267e1e6f70e52e5a9740d32861d36b6f",
+                "sha256:2894f2df484ff56d717bead0a5c2abb6b9d2bf26d6960c4604d5c48bbc30ee73",
+                "sha256:29314480e958fd8aab22e4a58b355b629c59bf5f2ac2492b61e3dc06d8c7a315",
+                "sha256:293e7ea41280cb28c6fcaaa0b1aa1f533b8ce060b9e701d78511e1e6c4a1de76",
+                "sha256:34eff4b97f3d982fb93e2831e6750127d1355a923ebaeeb565407b3d2f8d41a1",
+                "sha256:35f27e6eb43380fa080dccf676dece30bef72e4a67617ffda586641cd4508d49",
+                "sha256:3c3f39fa737542161d8b0d680df2ec249334cd70a8f420f71c9304bd83c3cbed",
+                "sha256:3d3dd4c9e559eb172ecf00a2a7517e97d1e96de2a5e610bd9b68cea3925b4892",
+                "sha256:43e0b9d9e2c9e5d152946b9c5fe062c151614b262fda2e7b201204de0b99e482",
+                "sha256:48e1c69bbacfc3d932221851b39d49e81567a4d4aac3b21258d9c24578280058",
+                "sha256:51182f8927c5af975fece87b1b369f722c570fe169f9880764b1ee3bca8347b5",
+                "sha256:58e3f59d583d413809d60779492342801d6e82fefb89c86a38e040c16883be53",
+                "sha256:5de7970188bb46b7bf9858eb6890aad302577a5f6f75091fd7cdd3ef13ef3045",
+                "sha256:65fa59693c62cf06e45ddbb822165394a288edce9e276647f0046e1ec26920f3",
+                "sha256:681d07b0d1e3c462dd15585ef5e33cb021321588bebd910124ef4f4fb71aef55",
+                "sha256:69e395c24fc60aad6bb4fa7e583698ea6cc684648e1ffb7fe85e3c1ca131a7d5",
+                "sha256:6c97d7350133666fbb5cf4abdc1178c812cb205dc6f41d174a7b0f18fb93337e",
+                "sha256:6e4714cc64f474e4d6e37cfff31a814b509a35cb17de4fb1999907575684479c",
+                "sha256:72d8d3ef52c208ee1c7b2e341f7d71c6fd3157138abf1a95166e6165dd5d4369",
+                "sha256:8ae6299f6c68de06f136f1f9e69458eae58f1dacf10af5c17353eae03aa0d827",
+                "sha256:8b198cec6c72df5289c05b05b8b0969819783f9418e0409865dac47288d2a053",
+                "sha256:99cd03ae7988a93dd00bcd9d0b75e1f6c426063d6f03d2f90b89e29b25b82dfa",
+                "sha256:9cf8022fb8d07a97c178b02327b284521c7708d7c71a9c9c355c178ac4bbd3d4",
+                "sha256:9de2e279153a443c656f2defd67769e6d1e4163952b3c622dcea5b08a6405322",
+                "sha256:9e93e79c2551ff263400e1e4be085a1210e12073a31c2011dbbda14bda0c6132",
+                "sha256:9ff227395193126d82e60319a673a037d5de84633f11279e336f9c0f189ecc62",
+                "sha256:a465da611f6fa124963b91bf432d960a555563efe4ed1cc403ba5077b15370aa",
+                "sha256:ad17025d226ee5beec591b52800c11680fca3df50b8b29fe51d882576e039ee0",
+                "sha256:afb29c1ba2e5a3736f1c301d9d0abe3ec8b86957d04ddfa9d7a6a42b9367e396",
+                "sha256:b85eb46a81787c50650f2392b9b4ef23e1f126313b9e0e9013b35c15e4288e2e",
+                "sha256:bb89f306e5da99f4d922728ddcd6f7fcebb3241fc40edebcb7284d7514741991",
+                "sha256:cbde590d4faaa07c72bf979734738f328d239913ba3e043b1e98fe9a39f8b2b6",
+                "sha256:cc5a8e069b9ebfa22e26d0e6b97d6f9781302fe7f4f2b8776c3e1daea35f1adc",
+                "sha256:cd2868886d547469123fadc46eac7ea5253ea7fcb139f12e1dfc2bbd406427d1",
+                "sha256:d42b11d692e11b6634f7613ad8df5d6d5f8875f5d48939520d351007b3c13406",
+                "sha256:df5052c5d867c1ea0b311fb7c3cd28b19df469c056f7fdcfe88c7473aa63e333",
+                "sha256:f2d45f97ab6bb54753eab54fffe75aaf3de4ff2341c9daee1987ee1837636f1d",
+                "sha256:fd78e5fee591709f32ef6edb9a015b4aa1a5022598e36227500c8f4e02328d9c"
+            ],
+            "version": "==1.14.5"
         },
         "decorator": {
             "hashes": [
-                "sha256:86156361c50488b84a3f148056ea716ca587df2f0de1d34750d35c21312725de",
-                "sha256:f069f3a01830ca754ba5258fde2278454a0b5b79e0d7f5c13b3b97e57d4acff6"
+                "sha256:6e5c199c16f7a9f0e3a61a4a54b3d27e7dad0dbdde92b944426cb20914376323",
+                "sha256:72ecfba4320a893c53f9706bebb2d55c270c1e51a28789361aa93e4a21319ed5"
             ],
-            "version": "==4.4.0"
+            "version": "==5.0.9"
         },
         "defusedxml": {
             "hashes": [
-                "sha256:6687150770438374ab581bb7a1b327a847dd9c5749e396102de3fad4e8a3ef93",
-                "sha256:f684034d135af4c6cbb949b8a4d2ed61634515257a67299e5f940fbaa34377f5"
+                "sha256:1bb3032db185915b62d7c6209c5a8792be6a32ab2fedacc84e01b52c51aa3e69",
+                "sha256:a352e7e428770286cc899e2542b6cdaedb2b4953ff269a210103ec58f6198a61"
             ],
-            "version": "==0.6.0"
+            "version": "==0.7.1"
         },
         "entrypoints": {
             "hashes": [
@@ -75,25 +155,26 @@
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:aa18d7378b00b40847790e7c27e11673d7fed219354109d0e7b9e5b25dc3ad26",
-                "sha256:d5f18a79777f3aa179c145737780282e27b508fc8fd688cb17c7a813e8bd39af"
+                "sha256:960d52ba7c21377c990412aca380bf3642d734c2eaab78a2c39319f67c6a5786",
+                "sha256:e592faad8de1bda9fe920cf41e15261e7131bcf266c30306eec00e8e225c1dd5"
             ],
-            "version": "==0.23"
+            "markers": "python_version < '3.8'",
+            "version": "==4.4.0"
         },
         "ipykernel": {
             "hashes": [
-                "sha256:167c3ef08450f5e060b76c749905acb0e0fbef9365899377a4a1eae728864383",
-                "sha256:b503913e0b4cce7ed2de965457dfb2edd633e8234161a60e23f2fe2161345d12"
+                "sha256:29eee66548ee7c2edb7941de60c0ccf0a7a8dd957341db0a49c5e8e6a0fcb712",
+                "sha256:e976751336b51082a89fc2099fb7f96ef20f535837c398df6eab1283c2070884"
             ],
-            "version": "==5.1.2"
+            "version": "==5.5.5"
         },
         "ipython": {
             "hashes": [
-                "sha256:c4ab005921641e40a68e405e286e7a1fcc464497e14d81b6914b4fd95e5dee9b",
-                "sha256:dd76831f065f17bddd7eaa5c781f5ea32de5ef217592cf019e34043b56895aa1"
+                "sha256:a171caa3d3d4c819a1c0742e3abecfd5a2b8ab525ca1c9f114b40b76b0679ab1",
+                "sha256:f86788eef439891438af3498525094cc2acbdbea4f2aa2f8895782d4ff471341"
             ],
             "markers": "python_version >= '3.3'",
-            "version": "==7.8.0"
+            "version": "==7.24.0"
         },
         "ipython-genutils": {
             "hashes": [
@@ -104,31 +185,31 @@
         },
         "ipywidgets": {
             "hashes": [
-                "sha256:13ffeca438e0c0f91ae583dc22f50379b9d6b28390ac7be8b757140e9a771516",
-                "sha256:e945f6e02854a74994c596d9db83444a1850c01648f1574adf144fbbabe05c97"
+                "sha256:9f1a43e620530f9e570e4a493677d25f08310118d315b00e25a18f12913c41f0",
+                "sha256:e6513cfdaf5878de30f32d57f6dc2474da395a2a2991b94d487406c0ab7f55ca"
             ],
-            "version": "==7.5.1"
+            "version": "==7.6.3"
         },
         "jedi": {
             "hashes": [
-                "sha256:786b6c3d80e2f06fd77162a07fed81b8baa22dde5d62896a790a331d6ac21a27",
-                "sha256:ba859c74fa3c966a22f2aeebe1b74ee27e2a462f56d3f5f7ca4a59af61bfe42e"
+                "sha256:18456d83f65f400ab0c2d3319e48520420ef43b23a086fdc05dff34132f0fb93",
+                "sha256:92550a404bad8afed881a137ec9a461fed49eca661414be45059329614ed0707"
             ],
-            "version": "==0.15.1"
+            "version": "==0.18.0"
         },
         "jinja2": {
             "hashes": [
-                "sha256:74320bb91f31270f9551d46522e33af46a80c3d619f4a4bf42b3164d30b5911f",
-                "sha256:9fe95f19286cfefaa917656583d020be14e7859c6b0252588391e47db34527de"
+                "sha256:1f06f2da51e7b56b8f238affdd6b4e2c61e39598a378cc49345bc1bd42a978a4",
+                "sha256:703f484b47a6af502e743c9122595cc812b0271f661722403114f71a79d0f5a4"
             ],
-            "version": "==2.10.3"
+            "version": "==3.0.1"
         },
         "jsonschema": {
             "hashes": [
-                "sha256:2fa0684276b6333ff3c0b1b27081f4b2305f0a36cf702a23db50edb141893c3f",
-                "sha256:94c0a13b4a0616458b42529091624e66700a17f847453e52279e35509a5b7631"
+                "sha256:4e5b3cf8216f577bee9ce139cbe72eca3ea4f292ec60928ff24758ce626cd163",
+                "sha256:c8a85b28d377cc7737e46e2d9f2b4f44ee3c0e1deac6bf46ddefc7187d30797a"
             ],
-            "version": "==3.1.1"
+            "version": "==3.2.0"
         },
         "jupyter": {
             "hashes": [
@@ -141,57 +222,85 @@
         },
         "jupyter-client": {
             "hashes": [
-                "sha256:60e6faec1031d63df57f1cc671ed673dced0ed420f4377ea33db37b1c188b910",
-                "sha256:d0c077c9aaa4432ad485e7733e4d91e48f87b4f4bab7d283d42bb24cbbba0a0f"
+                "sha256:9715152067e3f7ea3b56f341c9a0f9715c8c7cc316ee0eb13c3c84f5ca0065f5",
+                "sha256:e2ab61d79fbf8b56734a4c2499f19830fbd7f6fefb3e87868ef0545cb3c17eb9"
             ],
-            "version": "==5.3.4"
+            "version": "==6.2.0"
         },
         "jupyter-console": {
             "hashes": [
-                "sha256:308ce876354924fb6c540b41d5d6d08acfc946984bf0c97777c1ddcb42e0b2f5",
-                "sha256:cc80a97a5c389cbd30252ffb5ce7cefd4b66bde98219edd16bf5cb6f84bb3568"
+                "sha256:242248e1685039cd8bff2c2ecb7ce6c1546eb50ee3b08519729e6e881aec19c7",
+                "sha256:7799c4ea951e0e96ba8260575423cb323ea5a03fcf5503560fa3e15748869e27"
             ],
-            "version": "==6.0.0"
+            "version": "==6.4.0"
         },
         "jupyter-core": {
             "hashes": [
-                "sha256:1368a838bba378c3c99f54c2961489831ea929ec7689a1d59d9844e584bc27dc",
-                "sha256:85103cee6548992780912c1a0a9ec2583a4a18f1ef79a248ec0db4446500bce3"
+                "sha256:79025cb3225efcd36847d0840f3fc672c0abd7afd0de83ba8a1d3837619122b4",
+                "sha256:8c6c0cac5c1b563622ad49321d5ec47017bd18b94facb381c6973a0486395f8e"
+            ],
+            "version": "==4.7.1"
+        },
+        "jupyterlab-pygments": {
+            "hashes": [
+                "sha256:abfb880fd1561987efaefcb2d2ac75145d2a5d0139b1876d5be806e32f630008",
+                "sha256:cfcda0873626150932f438eccf0f8bf22bfa92345b814890ab360d666b254146"
             ],
-            "version": "==4.6.0"
+            "version": "==0.1.2"
+        },
+        "jupyterlab-widgets": {
+            "hashes": [
+                "sha256:5c1a29a84d3069208cb506b10609175b249b6486d6b1cbae8fcde2a11584fb78",
+                "sha256:caeaf3e6103180e654e7d8d2b81b7d645e59e432487c1d35a41d6d3ee56b3fef"
+            ],
+            "markers": "python_version >= '3.6'",
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@@ -207,54 +316,68 @@
             "index": "pypi",
             "version": "==1.3.0"
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-        "more-itertools": {
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-            "version": "==4.4.0"
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@@ -265,82 +388,110 @@
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+                "sha256:1389b615917d4196962a9b469e947ba862a8ec6f5094a47da5e7a8d404bc07a4",
+                "sha256:18dd2ca4540c476558099891c129e6f94109971d110b549db2a9775c817cedbd",
+                "sha256:24fb5bb641f0b2aa25fc3832f4b6fc62430f14a7d328229fe994b2bcdc07c93a",
+                "sha256:285514956c08c7830da9d94e01f5414661a987831bd9f95e4d89cc8aaae8da10",
+                "sha256:41049cff5265e9cd75606aa2c90a76b9c80b98d8fe70ee08cf4af3cedb113358",
+                "sha256:461ed80d741692d9457ab820b1cc057ba9c37c394e67b647b639f623c8b321f6",
+                "sha256:4b8fb1b3174b56fd020e4b10232b1764e52cf7f3babcfb460c5253bdc48adad0",
+                "sha256:4c4fe69c7dc0d13d4ae180ad650bb900854367f3349d3c16f0569f6c6447f698",
+                "sha256:4e9b9a2f6944acdaf57316436c1acdcb30b8df76726bcf570ad9342bc5001654",
+                "sha256:6355f81947e1fe6e7bb9e123aeb3067264391d3ebe8402709f824ef8673fa6f3",
+                "sha256:68be16107f41563b9f67d93dff1c9f5587e0f76aa8fd91dc04c83d813bcdab1f",
+                "sha256:68e2c4505992ab5b89f976f89a9135742b18d60068f761bef994a6805f1cae0c",
+                "sha256:7040d6dd85ea65703904d023d7f57fab793d7ffee9ba9e14f3b897f34ff2415d",
+                "sha256:734ea6565c71fc2d03d5b8c7d0d7519c96bb5567e0396da1b563c24a4ac66f0c",
+                "sha256:9ee48413a2d3cd867fd836737b4c89c24cea1150a37f4856d82d20293fa7519f",
+                "sha256:a1c77796f395804d6002ff56a6a8168c1f98579896897ad7e35665a9b4a9eec5",
+                "sha256:b2f707b52e09098a7770503e39294ca6e22ae5138ffa1dd36248b6436d23d78e",
+                "sha256:bf80b2cec42d96117248b99d3c86e263a00469c840a778e6cb52d916f4fdf82c",
+                "sha256:c4674004ed64685a38bee222cd75afa769424ec603f9329f0dd4777138337f48",
+                "sha256:c6a81c9e6754465d09a87e3acd74d9bb1f0039b2d785c6899622f0afdb41d760",
+                "sha256:c6d0c32532a0519997e1ded767e184ebb8543bdb351f8eff8570bd461e874efc",
+                "sha256:c8fff75af4c7af92dce9f81fa2a83ed009c3e1f33ee8b5222db2ef80b94e242e",
+                "sha256:cb9f9fe1305ef69b65794655fd89b2209b11bff3e837de981820a8aa051ef914",
+                "sha256:d3ecfee2ee8d91ab2e08d2d8e89302c729b244e302bbc39c5b5dde42306ff003",
+                "sha256:d5e5be93e1714a59a535bbbc086b9e4fd2448c7547c5288548f6fd86353cad9e",
+                "sha256:de5806be66c9108e4dcdaced084e8ceae14100aa559e2d57b4f0cceb98c462de",
+                "sha256:f49755684a963731479ff3035d45a8185545b4c9f662d368bd349c419839886d",
+                "sha256:fc712a90401bcbf3fa25747f189d6dcfccbecc32712701cad25c6355589dac57"
+            ],
+            "version": "==22.1.0"
         },
         "qtconsole": {
             "hashes": [
-                "sha256:40d5d8e00d070ea266dbf6f0da74c4b9597b8b8d67cd8233c3ffd8debf923703",
-                "sha256:b91e7412587e6cfe1644696538f73baf5611e837be5406633218443b2827c6d9"
+                "sha256:12c734494901658787339dea9bbd82f3dc0d5e394071377a1c77b4a0954d7d8b",
+                "sha256:3a2adecc43ff201a08972fb2179df22e7b3a08d71b9ed680f46ad1bfd4fb9132"
             ],
-            "version": "==4.5.5"
+            "version": "==5.1.0"
+        },
+        "qtpy": {
+            "hashes": [
+                "sha256:2db72c44b55d0fe1407be8fba35c838ad0d6d3bb81f23007886dc1fc0f459c8d",
+                "sha256:fa0b8363b363e89b2a6f49eddc162a04c0699ae95e109a6be3bb145a913190ea"
+            ],
+            "version": "==1.9.0"
         },
         "send2trash": {
             "hashes": [
@@ -351,57 +502,101 @@
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
+                "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
             ],
-            "version": "==1.12.0"
+            "version": "==1.16.0"
         },
         "terminado": {
             "hashes": [
-                "sha256:d9d012de63acb8223ac969c17c3043337c2fcfd28f3aea1ee429b345d01ef460",
-                "sha256:de08e141f83c3a0798b050ecb097ab6259c3f0331b2f7b7750c9075ced2c20c2"
+                "sha256:048ce7b271ad1f94c48130844af1de163e54913b919f8c268c89b36a6d468d7c",
+                "sha256:46fd07c9dc7db7321922270d544a1f18eaa7a02fd6cd4438314f27a687cabbea"
             ],
-            "version": "==0.8.2"
+            "version": "==0.10.0"
         },
         "testpath": {
             "hashes": [
-                "sha256:46c89ebb683f473ffe2aab0ed9f12581d4d078308a3cb3765d79c6b2317b0109",
-                "sha256:b694b3d9288dbd81685c5d2e7140b81365d46c29f5db4bc659de5aa6b98780f8"
+                "sha256:1acf7a0bcd3004ae8357409fc33751e16d37ccc650921da1094a86581ad1e417",
+                "sha256:8044f9a0bab6567fc644a3593164e872543bb44225b0e24846e2c89237937589"
             ],
-            "version": "==0.4.2"
+            "version": "==0.5.0"
         },
         "tornado": {
             "hashes": [
-                "sha256:349884248c36801afa19e342a77cc4458caca694b0eda633f5878e458a44cb2c",
-                "sha256:398e0d35e086ba38a0427c3b37f4337327231942e731edaa6e9fd1865bbd6f60",
-                "sha256:4e73ef678b1a859f0cb29e1d895526a20ea64b5ffd510a2307b5998c7df24281",
-                "sha256:559bce3d31484b665259f50cd94c5c28b961b09315ccd838f284687245f416e5",
-                "sha256:abbe53a39734ef4aba061fca54e30c6b4639d3e1f59653f0da37a0003de148c7",
-                "sha256:c845db36ba616912074c5b1ee897f8e0124df269468f25e4fe21fe72f6edd7a9",
-                "sha256:c9399267c926a4e7c418baa5cbe91c7d1cf362d505a1ef898fde44a07c9dd8a5"
-            ],
-            "version": "==6.0.3"
+                "sha256:0a00ff4561e2929a2c37ce706cb8233b7907e0cdc22eab98888aca5dd3775feb",
+                "sha256:0d321a39c36e5f2c4ff12b4ed58d41390460f798422c4504e09eb5678e09998c",
+                "sha256:1e8225a1070cd8eec59a996c43229fe8f95689cb16e552d130b9793cb570a288",
+                "sha256:20241b3cb4f425e971cb0a8e4ffc9b0a861530ae3c52f2b0434e6c1b57e9fd95",
+                "sha256:25ad220258349a12ae87ede08a7b04aca51237721f63b1808d39bdb4b2164558",
+                "sha256:33892118b165401f291070100d6d09359ca74addda679b60390b09f8ef325ffe",
+                "sha256:33c6e81d7bd55b468d2e793517c909b139960b6c790a60b7991b9b6b76fb9791",
+                "sha256:3447475585bae2e77ecb832fc0300c3695516a47d46cefa0528181a34c5b9d3d",
+                "sha256:34ca2dac9e4d7afb0bed4677512e36a52f09caa6fded70b4e3e1c89dbd92c326",
+                "sha256:3e63498f680547ed24d2c71e6497f24bca791aca2fe116dbc2bd0ac7f191691b",
+                "sha256:548430be2740e327b3fe0201abe471f314741efcb0067ec4f2d7dcfb4825f3e4",
+                "sha256:6196a5c39286cc37c024cd78834fb9345e464525d8991c21e908cc046d1cc02c",
+                "sha256:61b32d06ae8a036a6607805e6720ef00a3c98207038444ba7fd3d169cd998910",
+                "sha256:6286efab1ed6e74b7028327365cf7346b1d777d63ab30e21a0f4d5b275fc17d5",
+                "sha256:65d98939f1a2e74b58839f8c4dab3b6b3c1ce84972ae712be02845e65391ac7c",
+                "sha256:66324e4e1beede9ac79e60f88de548da58b1f8ab4b2f1354d8375774f997e6c0",
+                "sha256:6c77c9937962577a6a76917845d06af6ab9197702a42e1346d8ae2e76b5e3675",
+                "sha256:70dec29e8ac485dbf57481baee40781c63e381bebea080991893cd297742b8fd",
+                "sha256:7250a3fa399f08ec9cb3f7b1b987955d17e044f1ade821b32e5f435130250d7f",
+                "sha256:748290bf9112b581c525e6e6d3820621ff020ed95af6f17fedef416b27ed564c",
+                "sha256:7da13da6f985aab7f6f28debab00c67ff9cbacd588e8477034c0652ac141feea",
+                "sha256:8f959b26f2634a091bb42241c3ed8d3cedb506e7c27b8dd5c7b9f745318ddbb6",
+                "sha256:9de9e5188a782be6b1ce866e8a51bc76a0fbaa0e16613823fc38e4fc2556ad05",
+                "sha256:a48900ecea1cbb71b8c71c620dee15b62f85f7c14189bdeee54966fbd9a0c5bd",
+                "sha256:b87936fd2c317b6ee08a5741ea06b9d11a6074ef4cc42e031bc6403f82a32575",
+                "sha256:c77da1263aa361938476f04c4b6c8916001b90b2c2fdd92d8d535e1af48fba5a",
+                "sha256:cb5ec8eead331e3bb4ce8066cf06d2dfef1bfb1b2a73082dfe8a161301b76e37",
+                "sha256:cc0ee35043162abbf717b7df924597ade8e5395e7b66d18270116f8745ceb795",
+                "sha256:d14d30e7f46a0476efb0deb5b61343b1526f73ebb5ed84f23dc794bdb88f9d9f",
+                "sha256:d371e811d6b156d82aa5f9a4e08b58debf97c302a35714f6f45e35139c332e32",
+                "sha256:d3d20ea5782ba63ed13bc2b8c291a053c8d807a8fa927d941bd718468f7b950c",
+                "sha256:d3f7594930c423fd9f5d1a76bee85a2c36fd8b4b16921cae7e965f22575e9c01",
+                "sha256:dcef026f608f678c118779cd6591c8af6e9b4155c44e0d1bc0c87c036fb8c8c4",
+                "sha256:e0791ac58d91ac58f694d8d2957884df8e4e2f6687cdf367ef7eb7497f79eaa2",
+                "sha256:e385b637ac3acaae8022e7e47dfa7b83d3620e432e3ecb9a3f7f58f150e50921",
+                "sha256:e519d64089b0876c7b467274468709dadf11e41d65f63bba207e04217f47c085",
+                "sha256:e7229e60ac41a1202444497ddde70a48d33909e484f96eb0da9baf8dc68541df",
+                "sha256:ed3ad863b1b40cd1d4bd21e7498329ccaece75db5a5bf58cd3c9f130843e7102",
+                "sha256:f0ba29bafd8e7e22920567ce0d232c26d4d47c8b5cf4ed7b562b5db39fa199c5",
+                "sha256:fa2ba70284fa42c2a5ecb35e322e68823288a4251f9ba9cc77be04ae15eada68",
+                "sha256:fba85b6cd9c39be262fcd23865652920832b61583de2a2ca907dbd8e8a8c81e5"
+            ],
+            "version": "==6.1"
         },
         "traitlets": {
             "hashes": [
-                "sha256:70b4c6a1d9019d7b4f6846832288f86998aa3b9207c6821f3578a6a6a467fe44",
-                "sha256:d023ee369ddd2763310e4c3eae1ff649689440d4ae59d7485eb4cfbbe3e359f7"
+                "sha256:178f4ce988f69189f7e523337a3e11d91c786ded9360174a3d9ca83e79bc5396",
+                "sha256:69ff3f9d5351f31a7ad80443c2674b7099df13cc41fc5fa6e2f6d3b0330b0426"
             ],
-            "version": "==4.3.3"
+            "version": "==5.0.5"
+        },
+        "typing-extensions": {
+            "hashes": [
+                "sha256:0ac0f89795dd19de6b97debb0c6af1c70987fd80a2d62d1958f7e56fcc31b497",
+                "sha256:50b6f157849174217d0656f99dc82fe932884fb250826c18350e159ec6cdf342",
+                "sha256:779383f6086d90c99ae41cf0ff39aac8a7937a9283ce0a414e5dd782f4c94a84"
+            ],
+            "markers": "python_version < '3.8'",
+            "version": "==3.10.0.0"
         },
         "urllib3": {
             "hashes": [
-                "sha256:3de946ffbed6e6746608990594d08faac602528ac7015ac28d33cee6a45b7398",
-                "sha256:9a107b99a5393caf59c7aa3c1249c16e6879447533d0887f4336dde834c7be86"
+                "sha256:753a0374df26658f99d826cfe40394a686d05985786d946fbe4165b5148f5a7c",
+                "sha256:a7acd0977125325f516bda9735fa7142b909a8d01e8b2e4c8108d0984e6e0098"
             ],
-            "version": "==1.25.6"
+            "index": "pypi",
+            "version": "==1.26.5"
         },
         "wcwidth": {
             "hashes": [
-                "sha256:3df37372226d6e63e1b1e1eda15c594bca98a22d33a23832a90998faa96bc65e",
-                "sha256:f4ebe71925af7b40a864553f761ed559b43544f8f71746c2d756c7fe788ade7c"
+                "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784",
+                "sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83"
             ],
-            "version": "==0.1.7"
+            "version": "==0.2.5"
         },
         "webencodings": {
             "hashes": [
@@ -419,10 +614,10 @@
         },
         "zipp": {
             "hashes": [
-                "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e",
-                "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"
+                "sha256:3607921face881ba3e026887d8150cca609d517579abe052ac81fc5aeffdbd76",
+                "sha256:51cb66cc54621609dd593d1787f286ee42a5c0adbb4b29abea5a63edc3e03098"
             ],
-            "version": "==0.6.0"
+            "version": "==3.4.1"
         }
     },
     "develop": {}
diff --git a/examples/requirements.txt b/examples/requirements.txt
index 115b802..b1fcd7f 100644
--- a/examples/requirements.txt
+++ b/examples/requirements.txt
@@ -1,51 +1,62 @@
--i https://pypi.org/simple
-appnope==0.1.0 ; sys_platform == 'darwin'
-attrs==19.3.0
-backcall==0.1.0
-bleach==3.1.0
-certifi==2019.9.11
-decorator==4.4.0
-defusedxml==0.6.0
+-i https://pypi.org/simple/
+argon2-cffi==20.1.0
+async-generator==1.10
+attrs==21.2.0
+backcall==0.2.0
+bleach==3.3.0
+certifi==2021.5.30
+cffi==1.14.5
+decorator==5.0.9
+defusedxml==0.7.1
 entrypoints==0.3
-importlib-metadata==0.23
-ipykernel==5.1.2
+importlib-metadata==4.4.0 ; python_version < '3.8'
+ipykernel==5.5.5
 ipython-genutils==0.2.0
-ipython==7.8.0 ; python_version >= '3.3'
-ipywidgets==7.5.1
-jedi==0.15.1
-jinja2==2.10.3
-jsonschema==3.1.1
-jupyter-client==5.3.4
-jupyter-console==6.0.0
-jupyter-core==4.6.0
+ipython==7.24.0 ; python_version >= '3.3'
+ipywidgets==7.6.3
+jedi==0.18.0
+jinja2==3.0.1
+jsonschema==3.2.0
+jupyter-client==6.2.0
+jupyter-console==6.4.0
+jupyter-core==4.7.1
 jupyter==1.0.0
-markupsafe==1.1.1
+jupyterlab-pygments==0.1.2
+jupyterlab-widgets==1.0.0 ; python_version >= '3.6'
+markupsafe==2.0.1
+matplotlib-inline==0.1.2
 mistune==0.8.4
 modelcatalog-api==1.3.0
-more-itertools==7.2.0
-nbconvert==5.6.0
-nbformat==4.4.0
-notebook==6.0.1
-pandocfilters==1.4.2
-parso==0.5.1
-pexpect==4.7.0 ; sys_platform != 'win32'
+nbclient==0.5.3
+nbconvert==6.0.7
+nbformat==5.1.3
+nest-asyncio==1.5.1
+notebook==6.4.0
+packaging==20.9
+pandocfilters==1.4.3
+parso==0.8.2
+pexpect==4.8.0 ; sys_platform != 'win32'
 pickleshare==0.7.5
-prometheus-client==0.7.1
-prompt-toolkit==2.0.10
-ptyprocess==0.6.0 ; os_name != 'nt'
-pygments==2.4.2
-pyrsistent==0.15.4
-python-dateutil==2.8.0
-pyzmq==18.1.0
-qtconsole==4.5.5
+prometheus-client==0.11.0
+prompt-toolkit==3.0.18
+ptyprocess==0.7.0 ; os_name != 'nt'
+pycparser==2.20
+pygments==2.9.0
+pyparsing==2.4.7
+pyrsistent==0.17.3
+python-dateutil==2.8.1
+pyzmq==22.1.0
+qtconsole==5.1.0
+qtpy==1.9.0
 send2trash==1.5.0
-six==1.12.0
-terminado==0.8.2
-testpath==0.4.2
-tornado==6.0.3
-traitlets==4.3.3
-urllib3==1.25.6
-wcwidth==0.1.7
+six==1.16.0
+terminado==0.10.0
+testpath==0.5.0
+tornado==6.1
+traitlets==5.0.5
+typing-extensions==3.10.0.0 ; python_version < '3.8'
+urllib3==1.26.5
+wcwidth==0.2.5
 webencodings==0.5.1
 widgetsnbextension==3.5.1
-zipp==0.6.0
+zipp==3.4.1