diff --git a/Pipfile.lock b/Pipfile.lock
index 4e2562a..f140637 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -26,10 +26,10 @@
         },
         "aspy.yaml": {
             "hashes": [
-                "sha256:ae249074803e8b957c83fdd82a99160d0d6d26dff9ba81ba608b42eebd7d8cd3",
-                "sha256:c7390d79f58eb9157406966201abf26da0d56c07e0ff0deadc39c8f4dbc13482"
+                "sha256:463372c043f70160a9ec950c3f1e4c3a82db5fca01d334b6bc89c7164d744bdc",
+                "sha256:e7c742382eff2caed61f87a39d13f99109088e5e93f04d76eb8d4b28aa143f45"
             ],
-            "version": "==1.2.0"
+            "version": "==1.3.0"
         },
         "atomicwrites": {
             "hashes": [
@@ -40,10 +40,10 @@
         },
         "attrs": {
             "hashes": [
-                "sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79",
-                "sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399"
+                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
+                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
             ],
-            "version": "==19.1.0"
+            "version": "==19.3.0"
         },
         "black": {
             "hashes": [
@@ -55,10 +55,10 @@
         },
         "cfgv": {
             "hashes": [
-                "sha256:6e9f2feea5e84bc71e56abd703140d7a2c250fc5ba38b8702fd6a68ed4e3b2ef",
-                "sha256:e7f186d4a36c099a9e20b04ac3108bd8bb9b9257e692ce18c8c3764d5cb12172"
+                "sha256:edb387943b665bf9c434f717bf630fa78aecd53d5900d2e05da6ad6048553144",
+                "sha256:fbd93c9ab0a523bf7daec408f3be2ed99a980e20b2d19b50fc184ca6b820d289"
             ],
-            "version": "==1.6.0"
+            "version": "==2.0.1"
         },
         "click": {
             "hashes": [
@@ -69,37 +69,37 @@
         },
         "coverage": {
             "hashes": [
-                "sha256:029c69deaeeeae1b15bc6c59f0ffa28aa8473721c614a23f2c2976dec245cd12",
-                "sha256:02abbbebc6e9d5abe13cd28b5e963dedb6ffb51c146c916d17b18f141acd9947",
-                "sha256:1bbfe5b82a3921d285e999c6d256c1e16b31c554c29da62d326f86c173d30337",
-                "sha256:210c02f923df33a8d0e461c86fdcbbb17228ff4f6d92609fc06370a98d283c2d",
-                "sha256:2d0807ba935f540d20b49d5bf1c0237b90ce81e133402feda906e540003f2f7a",
-                "sha256:35d7a013874a7c927ce997350d314144ffc5465faf787bb4e46e6c4f381ef562",
-                "sha256:3636f9d0dcb01aed4180ef2e57a4e34bb4cac3ecd203c2a23db8526d86ab2fb4",
-                "sha256:42f4be770af2455a75e4640f033a82c62f3fb0d7a074123266e143269d7010ef",
-                "sha256:48440b25ba6cda72d4c638f3a9efa827b5b87b489c96ab5f4ff597d976413156",
-                "sha256:4dac8dfd1acf6a3ac657475dfdc66c621f291b1b7422a939cc33c13ac5356473",
-                "sha256:4e8474771c69c2991d5eab65764289a7dd450bbea050bc0ebb42b678d8222b42",
-                "sha256:551f10ddfeff56a1325e5a34eff304c5892aa981fd810babb98bfee77ee2fb17",
-                "sha256:5b104982f1809c1577912519eb249f17d9d7e66304ad026666cb60a5ef73309c",
-                "sha256:5c62aef73dfc87bfcca32cee149a1a7a602bc74bac72223236b0023543511c88",
-                "sha256:633151f8d1ad9467b9f7e90854a7f46ed8f2919e8bc7d98d737833e8938fc081",
-                "sha256:772207b9e2d5bf3f9d283b88915723e4e92d9a62c83f44ec92b9bd0cd685541b",
-                "sha256:7d5e02f647cd727afc2659ec14d4d1cc0508c47e6cfb07aea33d7aa9ca94d288",
-                "sha256:a9798a4111abb0f94584000ba2a2c74841f2cfe5f9254709756367aabbae0541",
-                "sha256:b38ea741ab9e35bfa7015c93c93bbd6a1623428f97a67083fc8ebd366238b91f",
-                "sha256:b6a5478c904236543c0347db8a05fac6fc0bd574c870e7970faa88e1d9890044",
-                "sha256:c6248bfc1de36a3844685a2e10ba17c18119ba6252547f921062a323fb31bff1",
-                "sha256:c705ab445936457359b1424ef25ccc0098b0491b26064677c39f1d14a539f056",
-                "sha256:d95a363d663ceee647291131dbd213af258df24f41350246842481ec3709bd33",
-                "sha256:e27265eb80cdc5dab55a40ef6f890e04ecc618649ad3da5265f128b141f93f78",
-                "sha256:ebc276c9cb5d917bd2ae959f84ffc279acafa9c9b50b0fa436ebb70bbe2166ea",
-                "sha256:f4d229866d030863d0fe3bf297d6d11e6133ca15bbb41ed2534a8b9a3d6bd061",
-                "sha256:f95675bd88b51474d4fe5165f3266f419ce754ffadfb97f10323931fa9ac95e5",
-                "sha256:f95bc54fb6d61b9f9ff09c4ae8ff6a3f5edc937cda3ca36fc937302a7c152bf1",
-                "sha256:fd0f6be53de40683584e5331c341e65a679dbe5ec489a0697cec7c2ef1a48cda"
+                "sha256:2358e685d0253125da42a48396038d4c7b4cd1448c00bbc4bda0cb8c43c2a870",
+                "sha256:25017cf384eeed2e6caf72efd3ec4124e32a8b7a4387600499104387975400c7",
+                "sha256:2e2de9423ff8b14303a97eafddd16c479fbcc9a0b8b0be3b7c3843a3e0cf6d69",
+                "sha256:324ed908e4e40a6e2451056fe502470ad4e79495cb7a03ecab94e6309c3e117e",
+                "sha256:34f865a0cf6255b694a46e4383a7131c61ea72c5b4c4f81d20e522fb1e440b4b",
+                "sha256:3a2bcc464b60a18f1f7167b95b2773ede93bf3722bfa59e0802717f652b6cc25",
+                "sha256:48d70865266d649b6602e2ba94820d7972ef470d3b72a8fd41a3d17321feed3a",
+                "sha256:50cf23523ab3a724c6905d3b60f87fa8250d9bae3995e09f49f63effa2b54f15",
+                "sha256:54c84a68abd8c4c5b71878b35eb85321df41f3d144c78181867d5b026ec74994",
+                "sha256:5b59d661ee7f3200aedd7b71882b7927ea7ed522df75e3853f316a79ad872a2e",
+                "sha256:5ffb39624bc573177888a21fb301ccee46838c600b27d58c3e9dae495f44d34a",
+                "sha256:699b3072b7f0e69ed175a88fa8b2ec7eefc4f34d490c54ed9a52feff21a15fdc",
+                "sha256:79ef4a2bb862110bd585174e551a783bee5c3aa461734a2ac7429193be357589",
+                "sha256:8210a6f93c4a8c6d460b402e20e38399529b99200c3318542faf6a520c9b6a5c",
+                "sha256:8d30c10cfd0a6fdf0a2d5023de00ef7b329cd6ead2310c9e53eab79c209acb70",
+                "sha256:97ac79ff28f2cda6ac00a803ee582b965951755f61ab43377482bfba450b619a",
+                "sha256:9fe4aacacff9028ed167db108bf013510654f148d83c4857fed61d2ce0588bf2",
+                "sha256:a5b6395d5957d638f8b1870561607e3c39b1a236ea6cff9eafe5b9bb1db913f2",
+                "sha256:ab32c5fad6905986a7e34e3acf01180a69bb60c2aa7331815b46e51c776a1943",
+                "sha256:ad67f0cfdfecbd49b9da46a7e488e6dc32a69388740b85c36a4ef4b33082cbad",
+                "sha256:aedad67c30326a1af324f45833a40b97180664912deb29942459ddbe9fa0ce19",
+                "sha256:b077cd0e70f41366ac1f9d09275258fa1906758a5d4f31cacc18b10dfcf90784",
+                "sha256:b8ea210810d3c14aec7561f8fe0d3eec582d1088100aaa0bb8153d53d867d20f",
+                "sha256:bf572722326ce6704e863447a070039a827072b7179352570859be899b9e6551",
+                "sha256:c0df57e189dacd2606cae6386acf127d01d85b2bf49acd9a65543b5d6c359ddc",
+                "sha256:d523e75f2a8a0b4a6a8be1287c0e0e3a561b8832b05ddd987d4cd7c62f3ad3bc",
+                "sha256:e10593c60c5f0bfd8b241bf9f27ef2191a3005b73dde8ada0424f642543a1e59",
+                "sha256:e9128444c83bc260aea988bf1ca6278a33ba730955bf94720468c656b61353eb",
+                "sha256:f7162f2e3711f3a08a8a741f92e1f63afd58d0713177979f2cf9723dd50161cf"
             ],
-            "version": "==5.0a4"
+            "version": "==5.0b1"
         },
         "entrypoints": {
             "hashes": [
@@ -126,17 +126,18 @@
         },
         "identify": {
             "hashes": [
-                "sha256:244e7864ef59f0c7c50c6db73f58564151d91345cd9b76ed793458953578cadd",
-                "sha256:8ff062f90ad4b09cfe79b5dfb7a12e40f19d2e68a5c9598a49be45f16aba7171"
+                "sha256:4f1fe9a59df4e80fcb0213086fcf502bc1765a01ea4fe8be48da3b65afd2a017",
+                "sha256:d8919589bd2a5f99c66302fec0ef9027b12ae150b0b0213999ad3f695fc7296e"
             ],
-            "version": "==1.4.1"
+            "version": "==1.4.7"
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:46fc60c34b6ed7547e2a723fc8de6dc2e3a1173f8423246b3ce497f064e9c3de",
-                "sha256:bc136180e961875af88b1ab85b4009f4f1278f8396a60526c0009f503a1a96ca"
+                "sha256:b044f07694ef14a6683b097ba56bd081dbc7cdc7c7fe46011e499dfecc082f21",
+                "sha256:e6ac600a142cf2db707b1998382cc7fc3b02befb7273876e01b8ad10b9652742"
             ],
-            "version": "==0.9"
+            "markers": "python_version < '3.8'",
+            "version": "==1.1.0"
         },
         "mccabe": {
             "hashes": [
@@ -147,11 +148,11 @@
         },
         "more-itertools": {
             "hashes": [
-                "sha256:2112d2ca570bb7c3e53ea1a35cd5df42bb0fd10c45f0fb97178679c3c03d64c7",
-                "sha256:c3e4748ba1aad8dba30a4886b0b1a2004f9a863837b8654e7059eebf727afa5a"
+                "sha256:53ff73f186307d9c8ef17a9600309154a6ae27f25579e80af4db8f047ba14bc2",
+                "sha256:a0ea684c39bc4315ba7aae406596ef191fd84f873d2d2751f84d64e81a7a2d45"
             ],
             "markers": "python_version > '2.7'",
-            "version": "==7.0.0"
+            "version": "==8.0.0"
         },
         "mypy": {
             "hashes": [
@@ -172,10 +173,10 @@
         },
         "mypy-extensions": {
             "hashes": [
-                "sha256:37e0e956f41369209a3d5f34580150bcacfabaa57b33a15c0b25f4b5725e0812",
-                "sha256:b16cabe759f55e3409a7d231ebd2841378fb0c27a5d1994719e340e4f429ac3e"
+                "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d",
+                "sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8"
             ],
-            "version": "==0.4.1"
+            "version": "==0.4.3"
         },
         "nodeenv": {
             "hashes": [
@@ -185,10 +186,10 @@
         },
         "pluggy": {
             "hashes": [
-                "sha256:19ecf9ce9db2fce065a7a0586e07cfb4ac8614fe96edf628a264b1c70116cf8f",
-                "sha256:84d306a647cc805219916e62aab89caa97a33a1dd8c342e87a37f91073cd4746"
+                "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
+                "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
             ],
-            "version": "==0.9.0"
+            "version": "==0.13.1"
         },
         "pre-commit": {
             "hashes": [
@@ -237,26 +238,28 @@
         },
         "pyyaml": {
             "hashes": [
-                "sha256:1adecc22f88d38052fb787d959f003811ca858b799590a5eaa70e63dca50308c",
-                "sha256:436bc774ecf7c103814098159fbb84c2715d25980175292c648f2da143909f95",
-                "sha256:460a5a4248763f6f37ea225d19d5c205677d8d525f6a83357ca622ed541830c2",
-                "sha256:5a22a9c84653debfbf198d02fe592c176ea548cccce47553f35f466e15cf2fd4",
-                "sha256:7a5d3f26b89d688db27822343dfa25c599627bc92093e788956372285c6298ad",
-                "sha256:9372b04a02080752d9e6f990179a4ab840227c6e2ce15b95e1278456664cf2ba",
-                "sha256:a5dcbebee834eaddf3fa7366316b880ff4062e4bcc9787b78c7fbb4a26ff2dd1",
-                "sha256:aee5bab92a176e7cd034e57f46e9df9a9862a71f8f37cad167c6fc74c65f5b4e",
-                "sha256:c51f642898c0bacd335fc119da60baae0824f2cde95b0330b56c0553439f0673",
-                "sha256:c68ea4d3ba1705da1e0d85da6684ac657912679a649e8868bd850d2c299cce13",
-                "sha256:e23d0cc5299223dcc37885dae624f382297717e459ea24053709675a976a3e19"
+                "sha256:05418379e70ae2e986d31cfb51b50bd0f93bf5ab9d9b40dabdb4616727c4c26e",
+                "sha256:37c31e6087df09321539c18b5b02382538354c350dc76f3b458a6c93745a545c",
+                "sha256:3fd57916529381a46619e1cbfe1d372c7e008d5945fb1953da4a03b195630c33",
+                "sha256:52559ed9a06e2775d5c7ec5d86932371a439d6594a21991589475894a399939b",
+                "sha256:79288cdd596f9b77687f9e363fabf74a71f0399034b2742a74b1ca1f0ba5285f",
+                "sha256:7f737a46c65635898a1cb19b2ddf4e0c906d3f2e422c995f828fb621f8fa856b",
+                "sha256:93c09bcfe50adc03bbfb74f665e680d984b1023e83d0b48c93f7e2a8e70ac4be",
+                "sha256:94641ee1659be00239882b74e824ca6bc6b0c42f3f63b772f8f42cfaacfc83ab",
+                "sha256:9af87170b8a6c8e3219139a7146835bde3f5532cc47553701829a111cb2a9313",
+                "sha256:b6bd554afb21407f503d7821b9b8a4c3e36d3eb3e8fee329aa138cb5bc4f4809",
+                "sha256:c41a87796b705a473db39d06c220b1f25616b8c92fb5ea5c7fe327d2dcd63eb3",
+                "sha256:f00cd88db394bab373bcdcc58ab2eb5c3c3e75a520c6fab084a66d0ecd8cf90c",
+                "sha256:f65ea27155c5401e493935abdb10929b6df66256f202b91d00e967e54411f3a0"
             ],
-            "version": "==5.1"
+            "version": "==5.2b1"
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:1f1b7d42e254082a9db6279deae68afb421ceba6158efa6131de7b3003ee93fd",
+                "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"
             ],
-            "version": "==1.12.0"
+            "version": "==1.13.0"
         },
         "toml": {
             "hashes": [
@@ -267,41 +270,42 @@
         },
         "typed-ast": {
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+                "sha256:c98a849da29147e7160d84011764a23bca8c3c3b4e7568bf172fdf6147d40e25",
+                "sha256:cca01d308c725013e555db9413ab4046323e9685f6fa67555f98f08cb4849200",
+                "sha256:d13420d91ce835fe3a8fdfd096f0ca71bf5f47761c10ba893d31f99564650e6b",
+                "sha256:d4cdcf7d0a37ebde934ec91e691c638c0272a310fbdb31a51757436a5bd58967",
+                "sha256:fcfc4869bcd15eb7b90baceb50bfaf1cdfea4a9c2bfa50db17114c6665ca835e"
             ],
-            "version": "==1.3.1"
+            "index": "pypi",
+            "version": "==1.3.2"
         },
         "virtualenv": {
             "hashes": [
-                "sha256:6aebaf4dd2568a0094225ebbca987859e369e3e5c22dc7d52e5406d504890417",
-                "sha256:984d7e607b0a5d1329425dd8845bd971b957424b5ba664729fab51ab8c11bc39"
+                "sha256:116655188441670978117d0ebb6451eb6a7526f9ae0796cc0dee6bd7356909b0",
+                "sha256:b57776b44f91511866594e477dd10e76a6eb44439cdd7f06dcd30ba4c5bd854f"
             ],
-            "version": "==16.4.3"
+            "version": "==16.7.8"
         },
         "zipp": {
             "hashes": [
-                "sha256:55ca87266c38af6658b84db8cfb7343cdb0bf275f93c7afaea0d8e7a209c7478",
-                "sha256:682b3e1c62b7026afe24eadf6be579fb45fec54c07ea218bded8092af07a68c4"
+                "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e",
+                "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"
             ],
-            "version": "==0.3.3"
+            "version": "==0.6.0"
         }
     }
 }