diff --git a/Pipfile.lock b/Pipfile.lock
index d994456..fa30792 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -26,10 +26,10 @@
         },
         "certifi": {
             "hashes": [
-                "sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c",
-                "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"
+                "sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee",
+                "sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8"
             ],
-            "version": "==2020.12.5"
+            "version": "==2021.5.30"
         },
         "chardet": {
             "hashes": [
@@ -140,31 +140,32 @@
         },
         "mypy": {
             "hashes": [
-                "sha256:0d0a87c0e7e3a9becdfbe936c981d32e5ee0ccda3e0f07e1ef2c3d1a817cf73e",
-                "sha256:25adde9b862f8f9aac9d2d11971f226bd4c8fbaa89fb76bdadb267ef22d10064",
-                "sha256:28fb5479c494b1bab244620685e2eb3c3f988d71fd5d64cc753195e8ed53df7c",
-                "sha256:2f9b3407c58347a452fc0736861593e105139b905cca7d097e413453a1d650b4",
-                "sha256:33f159443db0829d16f0a8d83d94df3109bb6dd801975fe86bacb9bf71628e97",
-                "sha256:3f2aca7f68580dc2508289c729bd49ee929a436208d2b2b6aab15745a70a57df",
-                "sha256:499c798053cdebcaa916eef8cd733e5584b5909f789de856b482cd7d069bdad8",
-                "sha256:4eec37370483331d13514c3f55f446fc5248d6373e7029a29ecb7b7494851e7a",
-                "sha256:552a815579aa1e995f39fd05dde6cd378e191b063f031f2acfe73ce9fb7f9e56",
-                "sha256:5873888fff1c7cf5b71efbe80e0e73153fe9212fafdf8e44adfe4c20ec9f82d7",
-                "sha256:61a3d5b97955422964be6b3baf05ff2ce7f26f52c85dd88db11d5e03e146a3a6",
-                "sha256:674e822aa665b9fd75130c6c5f5ed9564a38c6cea6a6432ce47eafb68ee578c5",
-                "sha256:7ce3175801d0ae5fdfa79b4f0cfed08807af4d075b402b7e294e6aa72af9aa2a",
-                "sha256:9743c91088d396c1a5a3c9978354b61b0382b4e3c440ce83cf77994a43e8c521",
-                "sha256:9f94aac67a2045ec719ffe6111df543bac7874cee01f41928f6969756e030564",
-                "sha256:a26f8ec704e5a7423c8824d425086705e381b4f1dfdef6e3a1edab7ba174ec49",
-                "sha256:abf7e0c3cf117c44d9285cc6128856106183938c68fd4944763003decdcfeb66",
-                "sha256:b09669bcda124e83708f34a94606e01b614fa71931d356c1f1a5297ba11f110a",
-                "sha256:cd07039aa5df222037005b08fbbfd69b3ab0b0bd7a07d7906de75ae52c4e3119",
-                "sha256:d23e0ea196702d918b60c8288561e722bf437d82cb7ef2edcd98cfa38905d506",
-                "sha256:d65cc1df038ef55a99e617431f0553cd77763869eebdf9042403e16089fe746c",
-                "sha256:d7da2e1d5f558c37d6e8c1246f1aec1e7349e4913d8fb3cb289a35de573fe2eb"
+                "sha256:07efc88486877d595cca7f7d237e6d04d1ba6f01dc8f74a81b716270f6770968",
+                "sha256:0e703c0afe36511746513d168e1d2a52f88e2a324169b87a6b6a58901c3afcf3",
+                "sha256:2220f97804890f3e6da3f849f81f3e56e367a2027a51dde5ce3b7ebb2ad3342b",
+                "sha256:22f97de97373dd6180c4abee90b20c60780820284d2cdc5579927c0e37854cf6",
+                "sha256:23100137579d718cd6f05d572574ca00701fa2bfc7b645ebc5130d93e2af3bee",
+                "sha256:3be7c68fab8b318a2d5bcfac8e028dc77b9096ea1ec5594e9866c8fb57ae0296",
+                "sha256:3f1d0601842c6b4248923963fc59a6fdd05dee0fddc8b07e30c508b6a269e68f",
+                "sha256:41f082275a20e3eea48364915f7bc6ec5338be89db1ed8b2e570b9e3d12d4dc6",
+                "sha256:42d66b3d716fe5e22b32915d1fa59e7183a0e02f00b337b834a596c1f5e37f01",
+                "sha256:468b3918b26f81d003e8e9b788c62160acb885487cf4d83a3f22ba9061cb49e2",
+                "sha256:6598e39cd5aa1a09d454ad39687b89cf3f3fd7cf1f9c3f81a1a2775f6f6b16f8",
+                "sha256:65c78570329c54fb40f956f7645e2359af5da9d8c54baa44f461cdc7f4984108",
+                "sha256:68fd1c1c1fc9b405f0ed6cfcd00541de7e83f41007419a125c20fa5db3881cb1",
+                "sha256:7eb1e5820deb71e313aa2b5a5220803a9b2e3efa43475537a71d0ffed7495e1e",
+                "sha256:80c96f97de241ee7383cfe646bfc51113a48089d50c33275af0033b98dee3b1c",
+                "sha256:83adbf3f8c5023f4276557fbcb3b6306f9dce01783e8ac5f8c11fcb29f62e899",
+                "sha256:9560b1f572cdaab43fdcdad5ef45138e89dc191729329db1b8ce5636f4cdeacf",
+                "sha256:a0461da00ed23d17fcb04940db2b72f920435cf79be943564b717e378ffeeddf",
+                "sha256:a354613b4cc6e0e9f1ba7811083cd8f63ccee97333d1df7594c438399c83249a",
+                "sha256:c2f87505840c0f3557ea4aa5893f2459daf6516adac30b15d1d5cf567e0d7939",
+                "sha256:d794f10b9f28d21af7a93054e217872aaf9b9ad1bd354ae5e1a3a923d734b73f",
+                "sha256:d90c296cd5cdef86e720a0994d41d72c06d6ff8ab8fc6aaaf0ee6c675835d596",
+                "sha256:e75f0c97cfe8d86da89b22ad7039f5af44b8f6b0af12bd2877791a92b4b9e987"
             ],
             "index": "pypi",
-            "version": "==0.812"
+            "version": "==0.900"
         },
         "mypy-extensions": {
             "hashes": [
@@ -181,40 +182,13 @@
             "index": "pypi",
             "version": "==2.25.1"
         },
-        "typed-ast": {
+        "toml": {
             "hashes": [
-                "sha256:01ae5f73431d21eead5015997ab41afa53aa1fbe252f9da060be5dad2c730ace",
-                "sha256:067a74454df670dcaa4e59349a2e5c81e567d8d65458d480a5b3dfecec08c5ff",
-                "sha256:0fb71b8c643187d7492c1f8352f2c15b4c4af3f6338f21681d3681b3dc31a266",
-                "sha256:1b3ead4a96c9101bef08f9f7d1217c096f31667617b58de957f690c92378b528",
-                "sha256:2068531575a125b87a41802130fa7e29f26c09a2833fea68d9a40cf33902eba6",
-                "sha256:209596a4ec71d990d71d5e0d312ac935d86930e6eecff6ccc7007fe54d703808",
-                "sha256:2c726c276d09fc5c414693a2de063f521052d9ea7c240ce553316f70656c84d4",
-                "sha256:398e44cd480f4d2b7ee8d98385ca104e35c81525dd98c519acff1b79bdaac363",
-                "sha256:52b1eb8c83f178ab787f3a4283f68258525f8d70f778a2f6dd54d3b5e5fb4341",
-                "sha256:5feca99c17af94057417d744607b82dd0a664fd5e4ca98061480fd8b14b18d04",
-                "sha256:7538e495704e2ccda9b234b82423a4038f324f3a10c43bc088a1636180f11a41",
-                "sha256:760ad187b1041a154f0e4d0f6aae3e40fdb51d6de16e5c99aedadd9246450e9e",
-                "sha256:777a26c84bea6cd934422ac2e3b78863a37017618b6e5c08f92ef69853e765d3",
-                "sha256:95431a26309a21874005845c21118c83991c63ea800dd44843e42a916aec5899",
-                "sha256:9ad2c92ec681e02baf81fdfa056fe0d818645efa9af1f1cd5fd6f1bd2bdfd805",
-                "sha256:9c6d1a54552b5330bc657b7ef0eae25d00ba7ffe85d9ea8ae6540d2197a3788c",
-                "sha256:aee0c1256be6c07bd3e1263ff920c325b59849dc95392a05f258bb9b259cf39c",
-                "sha256:af3d4a73793725138d6b334d9d247ce7e5f084d96284ed23f22ee626a7b88e39",
-                "sha256:b36b4f3920103a25e1d5d024d155c504080959582b928e91cb608a65c3a49e1a",
-                "sha256:b9574c6f03f685070d859e75c7f9eeca02d6933273b5e69572e5ff9d5e3931c3",
-                "sha256:bff6ad71c81b3bba8fa35f0f1921fb24ff4476235a6e94a26ada2e54370e6da7",
-                "sha256:c190f0899e9f9f8b6b7863debfb739abcb21a5c054f911ca3596d12b8a4c4c7f",
-                "sha256:c907f561b1e83e93fad565bac5ba9c22d96a54e7ea0267c708bffe863cbe4075",
-                "sha256:cae53c389825d3b46fb37538441f75d6aecc4174f615d048321b716df2757fb0",
-                "sha256:dd4a21253f42b8d2b48410cb31fe501d32f8b9fbeb1f55063ad102fe9c425e40",
-                "sha256:dde816ca9dac1d9c01dd504ea5967821606f02e510438120091b84e852367428",
-                "sha256:f2362f3cb0f3172c42938946dbc5b7843c2a28aec307c49100c8b38764eb6927",
-                "sha256:f328adcfebed9f11301eaedfa48e15bdece9b519fb27e6a8c01aa52a17ec31b3",
-                "sha256:f8afcf15cc511ada719a88e013cec87c11aff7b91f019295eb4530f96fe5ef2f",
-                "sha256:fb1bbeac803adea29cedd70781399c99138358c26d05fcbd23c13016b7f5ec65"
+                "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b",
+                "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"
             ],
-            "version": "==1.4.3"
+            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==0.10.2"
         },
         "typing-extensions": {
             "hashes": [
@@ -226,11 +200,11 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:2f4da4594db7e1e110a944bb1b551fdf4e6c136ad42e4234131391e21eb5b0df",
-                "sha256:e7b021f7241115872f92f43c6508082facffbd1c048e3c6e2bb9c2a157e28937"
+                "sha256:753a0374df26658f99d826cfe40394a686d05985786d946fbe4165b5148f5a7c",
+                "sha256:a7acd0977125325f516bda9735fa7142b909a8d01e8b2e4c8108d0984e6e0098"
             ],
             "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": "==1.26.4"
+            "version": "==1.26.5"
         }
     },
     "develop": {}