diff --git a/docs/Pipfile.lock b/docs/Pipfile.lock
index cd0448cc4..7a7a57076 100644
--- a/docs/Pipfile.lock
+++ b/docs/Pipfile.lock
@@ -23,102 +23,143 @@
             ],
             "version": "==0.7.12"
         },
-        "attrs": {
-            "hashes": [
-                "sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79",
-                "sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399"
-            ],
-            "version": "==19.1.0"
-        },
         "babel": {
             "hashes": [
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-                "sha256:e86135ae101e31e2c8ec20a4e0c5220f4eed12487d5cf3f78be7e98d3a57fc28"
+                "sha256:ab49e12b91d937cd11f0b67cb259a57ab4ad2b59ac7a3b41d6c06c0ac5b0def9",
+                "sha256:bc0c176f9f6a994582230df350aa6e05ba2ebe4b3ac317eab29d9be5d2768da0"
             ],
-            "version": "==2.7.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==2.9.1"
         },
         "certifi": {
             "hashes": [
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-                "sha256:945e3ba63a0b9f577b1395204e13c3a231f9bc0223888be653286534e5873695"
+                "sha256:78884e7c1d4b00ce3cea67b44566851c4343c120abd683433ce934a68ea58872",
+                "sha256:d62a0163eb4c2344ac042ab2bdf75399a71a2d8c7d47eac2e2ee91b9d6339569"
             ],
-            "version": "==2019.6.16"
+            "version": "==2021.10.8"
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-        "chardet": {
+        "charset-normalizer": {
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+                "sha256:e019de665e2bcf9c2b64e2e5aa025fa991da8720daa3c1138cadd2fd1856aed0",
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             ],
-            "version": "==3.0.4"
+            "markers": "python_version >= '3'",
+            "version": "==2.0.7"
         },
         "docutils": {
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-            "version": "==0.15.2"
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+            "version": "==0.18"
         },
         "idna": {
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-            "version": "==2.8"
+            "markers": "python_version >= '3'",
+            "version": "==3.3"
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         "imagesize": {
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-            "version": "==1.1.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==1.2.0"
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         "jinja2": {
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+            "version": "==2.0.1"
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-            "version": "==19.1"
+            "markers": "python_version >= '3.6'",
+            "version": "==21.2"
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         "parsimonious": {
             "hashes": [
@@ -136,37 +177,41 @@
         },
         "pyparsing": {
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-            "version": "==2019.1"
+            "version": "==2021.3"
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-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
+                "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
             ],
-            "version": "==1.12.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==1.16.0"
         },
         "snowballstemmer": {
             "hashes": [
-                "sha256:9f3b9ffe0809d174f7047e121431acf99c89a7040f0ca84f94ba53a498e6d0c9"
+                "sha256:b51b447bea85f9968c13b650126a888aabd4cb4463fca868ec596826325dedc2",
+                "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"
             ],
-            "version": "==1.9.0"
+            "version": "==2.1.0"
         },
         "sphinx": {
             "hashes": [
@@ -191,19 +236,29 @@
             "index": "pypi",
             "version": "==0.4.3"
         },
+        "sphinxcontrib-serializinghtml": {
+            "hashes": [
+                "sha256:352a9a00ae864471d3a7ead8d7d79f5fc0b57e8b3f95e9867eb9eb28999b92fd",
+                "sha256:aa5f6de5dfdf809ef505c4895e51ef5c9eac17d0f287933eb49ec495280b6952"
+            ],
+            "markers": "python_version >= '3.5'",
+            "version": "==1.1.5"
+        },
         "sphinxcontrib-websupport": {
             "hashes": [
-                "sha256:1501befb0fdf1d1c29a800fdbf4ef5dc5369377300ddbdd16d2cd40e54c6eefc",
-                "sha256:e02f717baf02d0b6c3dd62cf81232ffca4c9d5c331e03766982e3ff9f1d2bc3f"
+                "sha256:4edf0223a0685a7c485ae5a156b6f529ba1ee481a1417817935b20bde1956232",
+                "sha256:6fc9287dfc823fe9aa432463edd6cea47fa9ebbf488d7f289b322ffcfca075c7"
             ],
-            "version": "==1.1.2"
+            "markers": "python_version >= '3.5'",
+            "version": "==1.2.4"
         },
         "urllib3": {
             "hashes": [
-                "sha256:b246607a25ac80bedac05c6f282e3cdaf3afb65420fd024ac94435cabe6e18d1",
-                "sha256:dbe59173209418ae49d485b87d1681aefa36252ee85884c31346debd19463232"
+                "sha256:4987c65554f7a2dbf30c18fd48778ef124af6fab771a377103da0585e2336ece",
+                "sha256:c4fdf4019605b6e5423637e01bc9fe4daef873709a7973e195ceba0a62bbc844"
             ],
-            "version": "==1.25.3"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
+            "version": "==1.26.7"
         }
     },
     "develop": {
@@ -216,10 +271,9 @@
         },
         "livereload": {
             "hashes": [
-                "sha256:78d55f2c268a8823ba499305dcac64e28ddeb9a92571e12d543cd304faf5817b",
-                "sha256:89254f78d7529d7ea0a3417d224c34287ebfe266b05e67e51facaf82c27f0f66"
+                "sha256:776f2f865e59fde56490a56bcc6773b6917366bce0c267c60ee8aaf1a0959869"
             ],
-            "version": "==2.6.1"
+            "version": "==2.6.3"
         },
         "pathtools": {
             "hashes": [
@@ -235,26 +289,38 @@
         },
         "pyyaml": {
             "hashes": [
-                "sha256:57acc1d8533cbe51f6662a55434f0dbecfa2b9eaf115bede8f6fd00115a0c0d3",
-                "sha256:588c94b3d16b76cfed8e0be54932e5729cc185caffaa5a451e7ad2f7ed8b4043",
-                "sha256:68c8dd247f29f9a0d09375c9c6b8fdc64b60810ebf07ba4cdd64ceee3a58c7b7",
-                "sha256:70d9818f1c9cd5c48bb87804f2efc8692f1023dac7f1a1a5c61d454043c1d265",
-                "sha256:86a93cccd50f8c125286e637328ff4eef108400dd7089b46a7be3445eecfa391",
-                "sha256:a0f329125a926876f647c9fa0ef32801587a12328b4a3c741270464e3e4fa778",
-                "sha256:a3c252ab0fa1bb0d5a3f6449a4826732f3eb6c0270925548cac342bc9b22c225",
-                "sha256:b4bb4d3f5e232425e25dda21c070ce05168a786ac9eda43768ab7f3ac2770955",
-                "sha256:cd0618c5ba5bda5f4039b9398bb7fb6a317bb8298218c3de25c47c4740e4b95e",
-                "sha256:ceacb9e5f8474dcf45b940578591c7f3d960e82f926c707788a570b51ba59190",
-                "sha256:fe6a88094b64132c4bb3b631412e90032e8cfe9745a58370462240b8cb7553cd"
+                "sha256:02c78d77281d8f8d07a255e57abdbf43b02257f59f50cc6b636937d68efa5dd0",
+                "sha256:0dc9f2eb2e3c97640928dec63fd8dc1dd91e6b6ed236bd5ac00332b99b5c2ff9",
+                "sha256:124fd7c7bc1e95b1eafc60825f2daf67c73ce7b33f1194731240d24b0d1bf628",
+                "sha256:26fcb33776857f4072601502d93e1a619f166c9c00befb52826e7b774efaa9db",
+                "sha256:31ba07c54ef4a897758563e3a0fcc60077698df10180abe4b8165d9895c00ebf",
+                "sha256:3c49e39ac034fd64fd576d63bb4db53cda89b362768a67f07749d55f128ac18a",
+                "sha256:52bf0930903818e600ae6c2901f748bc4869c0c406056f679ab9614e5d21a166",
+                "sha256:5a3f345acff76cad4aa9cb171ee76c590f37394186325d53d1aa25318b0d4a09",
+                "sha256:5e7ac4e0e79a53451dc2814f6876c2fa6f71452de1498bbe29c0b54b69a986f4",
+                "sha256:7242790ab6c20316b8e7bb545be48d7ed36e26bbe279fd56f2c4a12510e60b4b",
+                "sha256:737bd70e454a284d456aa1fa71a0b429dd527bcbf52c5c33f7c8eee81ac16b89",
+                "sha256:8635d53223b1f561b081ff4adecb828fd484b8efffe542edcfdff471997f7c39",
+                "sha256:8b818b6c5a920cbe4203b5a6b14256f0e5244338244560da89b7b0f1313ea4b6",
+                "sha256:8bf38641b4713d77da19e91f8b5296b832e4db87338d6aeffe422d42f1ca896d",
+                "sha256:a36a48a51e5471513a5aea920cdad84cbd56d70a5057cca3499a637496ea379c",
+                "sha256:b2243dd033fd02c01212ad5c601dafb44fbb293065f430b0d3dbf03f3254d615",
+                "sha256:cc547d3ead3754712223abb7b403f0a184e4c3eae18c9bb7fd15adef1597cc4b",
+                "sha256:cc552b6434b90d9dbed6a4f13339625dc466fd82597119897e9489c953acbc22",
+                "sha256:f3790156c606299ff499ec44db422f66f05a7363b39eb9d5b064f17bd7d7c47b",
+                "sha256:f7a21e3d99aa3095ef0553e7ceba36fb693998fbb1226f1392ce33681047465f",
+                "sha256:fdc6b2cb4b19e431994f25a9160695cc59a4e861710cc6fc97161c5e845fc579"
             ],
-            "version": "==5.1.1"
+            "index": "pypi",
+            "version": "==5.4"
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
+                "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
             ],
-            "version": "==1.12.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==1.16.0"
         },
         "sphinx-autobuild": {
             "hashes": [
@@ -266,21 +332,79 @@
         },
         "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"
+            ],
+            "markers": "python_version >= '3.5'",
+            "version": "==6.1"
         },
         "watchdog": {
             "hashes": [
-                "sha256:965f658d0732de3188211932aeb0bb457587f04f63ab4c1e33eab878e9de961d"
-            ],
-            "version": "==0.9.0"
+                "sha256:25fb5240b195d17de949588628fdf93032ebf163524ef08933db0ea1f99bd685",
+                "sha256:3386b367e950a11b0568062b70cc026c6f645428a698d33d39e013aaeda4cc04",
+                "sha256:3becdb380d8916c873ad512f1701f8a92ce79ec6978ffde92919fd18d41da7fb",
+                "sha256:4ae38bf8ba6f39d5b83f78661273216e7db5b00f08be7592062cb1fc8b8ba542",
+                "sha256:8047da932432aa32c515ec1447ea79ce578d0559362ca3605f8e9568f844e3c6",
+                "sha256:8f1c00aa35f504197561060ca4c21d3cc079ba29cf6dd2fe61024c70160c990b",
+                "sha256:922a69fa533cb0c793b483becaaa0845f655151e7256ec73630a1b2e9ebcb660",
+                "sha256:9693f35162dc6208d10b10ddf0458cc09ad70c30ba689d9206e02cd836ce28a3",
+                "sha256:a0f1c7edf116a12f7245be06120b1852275f9506a7d90227648b250755a03923",
+                "sha256:a36e75df6c767cbf46f61a91c70b3ba71811dfa0aca4a324d9407a06a8b7a2e7",
+                "sha256:aba5c812f8ee8a3ff3be51887ca2d55fb8e268439ed44110d3846e4229eb0e8b",
+                "sha256:ad6f1796e37db2223d2a3f302f586f74c72c630b48a9872c1e7ae8e92e0ab669",
+                "sha256:ae67501c95606072aafa865b6ed47343ac6484472a2f95490ba151f6347acfc2",
+                "sha256:b2fcf9402fde2672545b139694284dc3b665fd1be660d73eca6805197ef776a3",
+                "sha256:b52b88021b9541a60531142b0a451baca08d28b74a723d0c99b13c8c8d48d604",
+                "sha256:b7d336912853d7b77f9b2c24eeed6a5065d0a0cc0d3b6a5a45ad6d1d05fb8cd8",
+                "sha256:bd9ba4f332cf57b2c1f698be0728c020399ef3040577cde2939f2e045b39c1e5",
+                "sha256:be9be735f827820a06340dff2ddea1fb7234561fa5e6300a62fe7f54d40546a0",
+                "sha256:cca7741c0fcc765568350cb139e92b7f9f3c9a08c4f32591d18ab0a6ac9e71b6",
+                "sha256:d0d19fb2441947b58fbf91336638c2b9f4cc98e05e1045404d7a4cb7cddc7a65",
+                "sha256:e02794ac791662a5eafc6ffeaf9bcc149035a0e48eb0a9d40a8feb4622605a3d",
+                "sha256:e0f30db709c939cabf64a6dc5babb276e6d823fd84464ab916f9b9ba5623ca15",
+                "sha256:e92c2d33858c8f560671b448205a268096e17870dcf60a9bb3ac7bfbafb7f5f9"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==2.1.6"
         }
     }
 }
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 96a735b8f..e53468192 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,23 +1,31 @@
+#
+# These requirements were autogenerated by pipenv
+# To regenerate from the project's Pipfile, run:
+#
+#    pipenv lock --requirements
+#
+
+-i https://pypi.org/simple/
 alabaster==0.7.12
-attrs==19.1.0
-Babel==2.7.0
-certifi==2019.6.16
-chardet==3.0.4
-docutils==0.15.2
-idna==2.8
-imagesize==1.1.0
-Jinja2==2.10.1
-MarkupSafe==1.1.1
-packaging==19.1
+babel==2.9.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+certifi==2021.10.8
+charset-normalizer==2.0.7; python_version >= '3'
+docutils==0.18; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
+idna==3.3; python_version >= '3'
+imagesize==1.2.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+jinja2==2.11.3; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
+markupsafe==2.0.1; python_version >= '3.6'
+packaging==21.2; python_version >= '3.6'
 parsimonious==0.7.0
-Pygments==2.4.2
-pyparsing==2.4.2
-pytz==2019.1
-requests==2.22.0
-six==1.12.0
-snowballstemmer==1.9.0
-Sphinx==1.8.5
+pygments==2.4.2
+pyparsing==2.4.7; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'
+pytz==2021.3
+requests==2.26.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5'
+six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+snowballstemmer==2.1.0
 sphinx-js==2.7.1
 sphinx-rtd-theme==0.4.3
-sphinxcontrib-websupport==1.1.2
-urllib3==1.25.3
+sphinx==1.8.5
+sphinxcontrib-serializinghtml==1.1.5; python_version >= '3.5'
+sphinxcontrib-websupport==1.2.4; python_version >= '3.5'
+urllib3==1.26.7; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'