diff --git a/docs/Pipfile.lock b/docs/Pipfile.lock
index 8dbbbaf..e8df8a3 100644
--- a/docs/Pipfile.lock
+++ b/docs/Pipfile.lock
@@ -22,7 +22,7 @@
                 "sha256:ab49e12b91d937cd11f0b67cb259a57ab4ad2b59ac7a3b41d6c06c0ac5b0def9",
                 "sha256:bc0c176f9f6a994582230df350aa6e05ba2ebe4b3ac317eab29d9be5d2768da0"
             ],
-            "index": "pypi",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.9.1"
         },
         "beautifulsoup4": {
@@ -35,11 +35,11 @@
         },
         "bracex": {
             "hashes": [
-                "sha256:8230f3a03f1f76c192a7844377124300fbaec83870a728b629dfabd9be9e83d0",
-                "sha256:fcd7d1ecd317c04f324dab3f40b74eb3a8409665bd397ea4279e2fbccb1a99da"
+                "sha256:096c4b788bf492f7af4e90ef8b5bcbfb99759ae3415ea1b83c9d29a5ed8f9a94",
+                "sha256:1c8d1296e00ad9a91030ccb4c291f9e4dc7c054f12c707ba3c5ff3e9a81bcd21"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==2.2"
+            "version": "==2.2.1"
         },
         "click": {
             "hashes": [
@@ -66,11 +66,11 @@
         },
         "gitdb": {
             "hashes": [
-                "sha256:6c4cc71933456991da20917998acbe6cf4fb41eeaab7d6d67fbc05ecd4c865b0",
-                "sha256:96bf5c08b157a666fec41129e6d327235284cca4c81e92109260f353ba138005"
+                "sha256:8033ad4e853066ba6ca92050b9df2f89301b8fc8bf7e9324d412a63f8bf1a8fd",
+                "sha256:bac2fd45c0a1c9cf619e63a90d62bdc63892ef92387424b855792a6cabe789aa"
             ],
-            "markers": "python_version >= '3.4'",
-            "version": "==4.0.7"
+            "markers": "python_version >= '3.6'",
+            "version": "==4.0.9"
         },
         "gitpython": {
             "hashes": [
@@ -94,6 +94,14 @@
             ],
             "version": "==0.1.12"
         },
+        "importlib-metadata": {
+            "hashes": [
+                "sha256:53ccfd5c134223e497627b9815d5030edf77d2ed573922f7a0b8f8bb81a1c100",
+                "sha256:75bdec14c397f528724c1bfd9709d660b33a4d2e77387a3358f20b848bb5e5fb"
+            ],
+            "markers": "python_version < '3.10'",
+            "version": "==4.8.2"
+        },
         "jinja2": {
             "hashes": [
                 "sha256:03e47ad063331dd6a3f04a43eddca8a966a26ba0c5b7207a9a9e4e08f1b29419",
@@ -134,65 +142,77 @@
         },
         "lxml": {
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-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-            "version": "==4.6.3"
+            "index": "pypi",
+            "version": "==4.6.5"
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         "markdown": {
             "hashes": [
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             "markers": "python_version >= '3.6'",
-            "version": "==3.3.4"
+            "version": "==3.3.6"
         },
         "markupsafe": {
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@@ -432,44 +452,82 @@
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-                "sha256:e39eafa854e469d7225066c806c76b9a0acba5ff5ce36c82c0224b75e24888f2",
-                "sha256:edff4e31d159672a7b9d70164b21289e4b53b239ce1dc945bf9643d266537573",
-                "sha256:f1b23304855303bd97b5954edab63b8ddd56c91c41c6d4eba408228c0bae95f3",
-                "sha256:f3da121de36a9ead0f32b44ea720ee8c87edbb59dca6bb980d18377d84ad58a3",
-                "sha256:f68c71aabb10b1352a06515e25a425a703ba85660ae04cf074da5eb91c0af5e5",
-                "sha256:f82d3adde46ac9188db3aa7e6e1690865ebb6448d245df5a3ea22284f70d9e46",
-                "sha256:fd1bfc6b7347de9f0ae1fb6f9080426bed6a9ca55b5766fa4fdf7b3a29ccae9c"
-            ],
-            "version": "==2021.10.21"
+                "sha256:0416f7399e918c4b0e074a0f66e5191077ee2ca32a0f99d4c187a62beb47aa05",
+                "sha256:05b7d6d7e64efe309972adab77fc2af8907bb93217ec60aa9fe12a0dad35874f",
+                "sha256:0617383e2fe465732af4509e61648b77cbe3aee68b6ac8c0b6fe934db90be5cc",
+                "sha256:07856afef5ffcc052e7eccf3213317fbb94e4a5cd8177a2caa69c980657b3cb4",
+                "sha256:0f594b96fe2e0821d026365f72ac7b4f0b487487fb3d4aaf10dd9d97d88a9737",
+                "sha256:139a23d1f5d30db2cc6c7fd9c6d6497872a672db22c4ae1910be22d4f4b2068a",
+                "sha256:162abfd74e88001d20cb73ceaffbfe601469923e875caf9118333b1a4aaafdc4",
+                "sha256:2207ae4f64ad3af399e2d30dde66f0b36ae5c3129b52885f1bffc2f05ec505c8",
+                "sha256:2409b5c9cef7054dde93a9803156b411b677affc84fca69e908b1cb2c540025d",
+                "sha256:2fee3ed82a011184807d2127f1733b4f6b2ff6ec7151d83ef3477f3b96a13d03",
+                "sha256:30ab804ea73972049b7a2a5c62d97687d69b5a60a67adca07eb73a0ddbc9e29f",
+                "sha256:3598893bde43091ee5ca0a6ad20f08a0435e93a69255eeb5f81b85e81e329264",
+                "sha256:3b5df18db1fccd66de15aa59c41e4f853b5df7550723d26aa6cb7f40e5d9da5a",
+                "sha256:3c5fb32cc6077abad3bbf0323067636d93307c9fa93e072771cf9a64d1c0f3ef",
+                "sha256:416c5f1a188c91e3eb41e9c8787288e707f7d2ebe66e0a6563af280d9b68478f",
+                "sha256:42b50fa6666b0d50c30a990527127334d6b96dd969011e843e726a64011485da",
+                "sha256:432bd15d40ed835a51617521d60d0125867f7b88acf653e4ed994a1f8e4995dc",
+                "sha256:473e67837f786404570eae33c3b64a4b9635ae9f00145250851a1292f484c063",
+                "sha256:4aaa4e0705ef2b73dd8e36eeb4c868f80f8393f5f4d855e94025ce7ad8525f50",
+                "sha256:50a7ddf3d131dc5633dccdb51417e2d1910d25cbcf842115a3a5893509140a3a",
+                "sha256:529801a0d58809b60b3531ee804d3e3be4b412c94b5d267daa3de7fadef00f49",
+                "sha256:537ca6a3586931b16a85ac38c08cc48f10fc870a5b25e51794c74df843e9966d",
+                "sha256:53db2c6be8a2710b359bfd3d3aa17ba38f8aa72a82309a12ae99d3c0c3dcd74d",
+                "sha256:5537f71b6d646f7f5f340562ec4c77b6e1c915f8baae822ea0b7e46c1f09b733",
+                "sha256:563d5f9354e15e048465061509403f68424fef37d5add3064038c2511c8f5e00",
+                "sha256:5d408a642a5484b9b4d11dea15a489ea0928c7e410c7525cd892f4d04f2f617b",
+                "sha256:61600a7ca4bcf78a96a68a27c2ae9389763b5b94b63943d5158f2a377e09d29a",
+                "sha256:6650f16365f1924d6014d2ea770bde8555b4a39dc9576abb95e3cd1ff0263b36",
+                "sha256:666abff54e474d28ff42756d94544cdfd42e2ee97065857413b72e8a2d6a6345",
+                "sha256:68a067c11463de2a37157930d8b153005085e42bcb7ad9ca562d77ba7d1404e0",
+                "sha256:6e1d2cc79e8dae442b3fa4a26c5794428b98f81389af90623ffcc650ce9f6732",
+                "sha256:74cbeac0451f27d4f50e6e8a8f3a52ca074b5e2da9f7b505c4201a57a8ed6286",
+                "sha256:780b48456a0f0ba4d390e8b5f7c661fdd218934388cde1a974010a965e200e12",
+                "sha256:788aef3549f1924d5c38263104dae7395bf020a42776d5ec5ea2b0d3d85d6646",
+                "sha256:7ee1227cf08b6716c85504aebc49ac827eb88fcc6e51564f010f11a406c0a667",
+                "sha256:7f301b11b9d214f83ddaf689181051e7f48905568b0c7017c04c06dfd065e244",
+                "sha256:83ee89483672b11f8952b158640d0c0ff02dc43d9cb1b70c1564b49abe92ce29",
+                "sha256:85bfa6a5413be0ee6c5c4a663668a2cad2cbecdee367630d097d7823041bdeec",
+                "sha256:9345b6f7ee578bad8e475129ed40123d265464c4cfead6c261fd60fc9de00bcf",
+                "sha256:93a5051fcf5fad72de73b96f07d30bc29665697fb8ecdfbc474f3452c78adcf4",
+                "sha256:962b9a917dd7ceacbe5cd424556914cb0d636001e393b43dc886ba31d2a1e449",
+                "sha256:96fc32c16ea6d60d3ca7f63397bff5c75c5a562f7db6dec7d412f7c4d2e78ec0",
+                "sha256:98ba568e8ae26beb726aeea2273053c717641933836568c2a0278a84987b2a1a",
+                "sha256:a3feefd5e95871872673b08636f96b61ebef62971eab044f5124fb4dea39919d",
+                "sha256:a955b747d620a50408b7fdf948e04359d6e762ff8a85f5775d907ceced715129",
+                "sha256:b43c2b8a330a490daaef5a47ab114935002b13b3f9dc5da56d5322ff218eeadb",
+                "sha256:b483c9d00a565633c87abd0aaf27eb5016de23fed952e054ecc19ce32f6a9e7e",
+                "sha256:b9ed0b1e5e0759d6b7f8e2f143894b2a7f3edd313f38cf44e1e15d360e11749b",
+                "sha256:ba05430e819e58544e840a68b03b28b6d328aff2e41579037e8bab7653b37d83",
+                "sha256:ca49e1ab99593438b204e00f3970e7a5f70d045267051dfa6b5f4304fcfa1dbf",
+                "sha256:ca5f18a75e1256ce07494e245cdb146f5a9267d3c702ebf9b65c7f8bd843431e",
+                "sha256:cd410a1cbb2d297c67d8521759ab2ee3f1d66206d2e4328502a487589a2cb21b",
+                "sha256:ce298e3d0c65bd03fa65ffcc6db0e2b578e8f626d468db64fdf8457731052942",
+                "sha256:d5ca078bb666c4a9d1287a379fe617a6dccd18c3e8a7e6c7e1eb8974330c626a",
+                "sha256:d5fd67df77bab0d3f4ea1d7afca9ef15c2ee35dfb348c7b57ffb9782a6e4db6e",
+                "sha256:da1a90c1ddb7531b1d5ff1e171b4ee61f6345119be7351104b67ff413843fe94",
+                "sha256:dba70f30fd81f8ce6d32ddeef37d91c8948e5d5a4c63242d16a2b2df8143aafc",
+                "sha256:dc07f021ee80510f3cd3af2cad5b6a3b3a10b057521d9e6aaeb621730d320c5a",
+                "sha256:dd33eb9bdcfbabab3459c9ee651d94c842bc8a05fabc95edf4ee0c15a072495e",
+                "sha256:e0538c43565ee6e703d3a7c3bdfe4037a5209250e8502c98f20fea6f5fdf2965",
+                "sha256:e1f54b9b4b6c53369f40028d2dd07a8c374583417ee6ec0ea304e710a20f80a0",
+                "sha256:e32d2a2b02ccbef10145df9135751abea1f9f076e67a4e261b05f24b94219e36",
+                "sha256:e6096b0688e6e14af6a1b10eaad86b4ff17935c49aa774eac7c95a57a4e8c296",
+                "sha256:e71255ba42567d34a13c03968736c5d39bb4a97ce98188fafb27ce981115beec",
+                "sha256:ed2e07c6a26ed4bea91b897ee2b0835c21716d9a469a96c3e878dc5f8c55bb23",
+                "sha256:eef2afb0fd1747f33f1ee3e209bce1ed582d1896b240ccc5e2697e3275f037c7",
+                "sha256:f23222527b307970e383433daec128d769ff778d9b29343fb3496472dc20dabe",
+                "sha256:f341ee2df0999bfdf7a95e448075effe0db212a59387de1a70690e4acb03d4c6",
+                "sha256:f5be7805e53dafe94d295399cfbe5227f39995a997f4fd8539bf3cbdc8f47ca8",
+                "sha256:f7f325be2804246a75a4f45c72d4ce80d2443ab815063cdf70ee8fb2ca59ee1b",
+                "sha256:f8af619e3be812a2059b212064ea7a640aff0568d972cd1b9e920837469eb3cb",
+                "sha256:fa8c626d6441e2d04b6ee703ef2d1e17608ad44c7cb75258c09dd42bacdfc64b",
+                "sha256:fbb9dc00e39f3e6c0ef48edee202f9520dafb233e8b51b06b8428cfcb92abd30",
+                "sha256:fff55f3ce50a3ff63ec8e2a8d3dd924f1941b250b0aac3d3d42b687eeff07a8e"
+            ],
+            "version": "==2021.11.10"
         },
         "six": {
             "hashes": [
@@ -481,19 +539,19 @@
         },
         "smmap": {
             "hashes": [
-                "sha256:7e65386bd122d45405ddf795637b7f7d2b532e7e401d46bbe3fb49b9986d5182",
-                "sha256:a9a7479e4c572e2e775c404dcd3080c8dc49f39918c2cf74913d30c4c478e3c2"
+                "sha256:2aba19d6a040e78d8b09de5c57e96207b09ed71d8e55ce0959eeee6c8e190d94",
+                "sha256:c840e62059cd3be204b0c9c9f74be2c09d5648eddd4580d9314c3ecde0b30936"
             ],
-            "markers": "python_version >= '3.5'",
-            "version": "==4.0.0"
+            "markers": "python_version >= '3.6'",
+            "version": "==5.0.0"
         },
         "soupsieve": {
             "hashes": [
-                "sha256:052774848f448cf19c7e959adf5566904d525f33a3f8b6ba6f6f8f26ec7de0cc",
-                "sha256:c2c1c2d44f158cdbddab7824a9af8c4f83c76b1e23e049479aa432feb6c4c23b"
+                "sha256:1a3cca2617c6b38c0343ed661b1fa5de5637f257d4fe22bd9f1338010a1efefb",
+                "sha256:b8d49b1cd4f037c7082a9683dfa1801aa2597fb11c3a1155b7a5b94829b4f1f9"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==2.2.1"
+            "version": "==2.3.1"
         },
         "termcolor": {
             "hashes": [
@@ -558,20 +616,19 @@
         },
         "typing-extensions": {
             "hashes": [
-                "sha256:49f75d16ff11f1cd258e1b988ccff82a3ca5570217d7ad8c5f48205dd99a677e",
-                "sha256:d8226d10bc02a29bcc81df19a26e56a9647f8b0a6d4a83924139f4a8b01f17b7",
-                "sha256:f1d25edafde516b146ecd0613dabcc61409817af4766fbbcfb8d1ad4ec441a34"
+                "sha256:4ca091dea149f945ec56afb48dae714f21e8692ef22a395223bcd328961b6a0e",
+                "sha256:7f001e5ac290a0c0401508864c7ec868be4e701886d5b573a9528ed3973d9d3b"
             ],
             "markers": "python_version < '3.10'",
-            "version": "==3.10.0.2"
+            "version": "==4.0.1"
         },
         "wcmatch": {
             "hashes": [
-                "sha256:4d54ddb506c90b5a5bba3a96a1cfb0bb07127909e19046a71d689ddfb18c3617",
-                "sha256:9146b1ab9354e0797ef6ef69bc89cb32cb9f46d1b9eeef69c559aeec8f3bffb6"
+                "sha256:371072912398af61d1e4e78609e18801c6faecd3cb36c54c82556a60abc965db",
+                "sha256:7141d2c85314253f16b38cb3d6cc0fb612918d407e1df3ccc2be7c86cc259c22"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==8.2"
+            "version": "==8.3"
         },
         "webencodings": {
             "hashes": [
@@ -579,6 +636,14 @@
                 "sha256:b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923"
             ],
             "version": "==0.5.1"
+        },
+        "zipp": {
+            "hashes": [
+                "sha256:71c644c5369f4a6e07636f0aa966270449561fcea2e3d6747b8d23efaa9d7832",
+                "sha256:9fe5ea21568a0a70e50f273397638d39b03353731e6cbbb3fd8502a33fec40bc"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==3.6.0"
         }
     }
 }
diff --git a/docs/doc-requirements.txt b/docs/doc-requirements.txt
index 99bbada..6b8863c 100644
--- a/docs/doc-requirements.txt
+++ b/docs/doc-requirements.txt
@@ -9,23 +9,24 @@
 # requirements. To emit only development requirements, pass "--dev-only".
 
 -i https://pypi.org/simple/
-babel==2.9.1
+babel==2.9.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 beautifulsoup4==4.10.0; python_version >= '3.1'
-bracex==2.2; python_version >= '3.6'
+bracex==2.2.1; python_version >= '3.6'
 click-man==0.4.1
 click==8.0.3; python_version >= '3.6'
 future==0.18.2; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'
-gitdb==4.0.7; python_version >= '3.4'
+gitdb==4.0.9; python_version >= '3.6'
 gitpython==3.1.24; python_version >= '3.7'
 html5lib==1.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 htmlmin==0.1.12
+importlib-metadata==4.8.2; python_version < '3.10'
 jinja2==2.11.3; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 joblib==1.1.0; python_version >= '3.6'
 jsmin==3.0.0
 livereload==2.6.3
 lunr[languages]==0.5.8
-lxml==4.6.3; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
-markdown==3.3.4; python_version >= '3.6'
+lxml==4.6.5
+markdown==3.3.6; python_version >= '3.6'
 markupsafe==1.1.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 mkdocs-exclude==1.0.2
 mkdocs-git-revision-date-localized-plugin==0.8
@@ -46,13 +47,14 @@ python-dateutil==2.8.2; python_version >= '2.7' and python_version not in '3.0,
 pytkdocs==0.10.1; python_version >= '3.6' and python_version < '4.0'
 pytz==2021.3
 pyyaml==6.0; python_version >= '3.6'
-regex==2021.10.21
+regex==2021.11.10
 six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-smmap==4.0.0; python_version >= '3.5'
-soupsieve==2.2.1; python_version >= '3.6'
+smmap==5.0.0; python_version >= '3.6'
+soupsieve==2.3.1; python_version >= '3.6'
 termcolor==1.1.0
 tornado==6.1; python_version >= '3.5'
 tqdm==4.62.3; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-typing-extensions==3.10.0.2; python_version < '3.10'
-wcmatch==8.2; python_version >= '3.6'
+typing-extensions==4.0.1; python_version < '3.10'
+wcmatch==8.3; python_version >= '3.6'
 webencodings==0.5.1
+zipp==3.6.0; python_version >= '3.6'