diff --git a/Pipfile.lock b/Pipfile.lock
index bd4ae8c..eaf653c 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -31,10 +31,10 @@
         },
         "attrs": {
             "hashes": [
-                "sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79",
-                "sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399"
+                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
+                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
             ],
-            "version": "==19.1.0"
+            "version": "==19.3.0"
         },
         "bleach": {
             "hashes": [
@@ -45,10 +45,10 @@
         },
         "certifi": {
             "hashes": [
-                "sha256:59b7658e26ca9c7339e00f8f4636cdfe59d34fa37b9b04f6f9e9926b3cece1a5",
-                "sha256:b26104d6835d1f5e49452a26eb2ff87fe7090b89dfcaee5ea2212697e1e1d7ae"
+                "sha256:017c25db2a153ce562900032d5bc68e9f191e44e9a0f762f373977de9df1fbb3",
+                "sha256:25b64c7da4cd7479594d035c08c2d809eb4aab3a26e5a990ea98cc450c320f1f"
             ],
-            "version": "==2019.3.9"
+            "version": "==2019.11.28"
         },
         "chardet": {
             "hashes": [
@@ -59,47 +59,48 @@
         },
         "coverage": {
             "hashes": [
-                "sha256:09e47c529ff77bf042ecfe858fb55c3e3eb97aac2c87f0349ab5a7efd6b3939f",
-                "sha256:0a1f9b0eb3aa15c990c328535655847b3420231af299386cfe5efc98f9c250fe",
-                "sha256:0cc941b37b8c2ececfed341444a456912e740ecf515d560de58b9a76562d966d",
-                "sha256:10e8af18d1315de936d67775d3a814cc81d0747a1a0312d84e27ae5610e313b0",
-                "sha256:1b4276550b86caa60606bd3572b52769860a81a70754a54acc8ba789ce74d607",
-                "sha256:1e8a2627c48266c7b813975335cfdea58c706fe36f607c97d9392e61502dc79d",
-                "sha256:2b224052bfd801beb7478b03e8a66f3f25ea56ea488922e98903914ac9ac930b",
-                "sha256:447c450a093766744ab53bf1e7063ec82866f27bcb4f4c907da25ad293bba7e3",
-                "sha256:46101fc20c6f6568561cdd15a54018bb42980954b79aa46da8ae6f008066a30e",
-                "sha256:4710dc676bb4b779c4361b54eb308bc84d64a2fa3d78e5f7228921eccce5d815",
-                "sha256:510986f9a280cd05189b42eee2b69fecdf5bf9651d4cd315ea21d24a964a3c36",
-                "sha256:5535dda5739257effef56e49a1c51c71f1d37a6e5607bb25a5eee507c59580d1",
-                "sha256:5a7524042014642b39b1fcae85fb37556c200e64ec90824ae9ecf7b667ccfc14",
-                "sha256:5f55028169ef85e1fa8e4b8b1b91c0b3b0fa3297c4fb22990d46ff01d22c2d6c",
-                "sha256:6694d5573e7790a0e8d3d177d7a416ca5f5c150742ee703f3c18df76260de794",
-                "sha256:6831e1ac20ac52634da606b658b0b2712d26984999c9d93f0c6e59fe62ca741b",
-                "sha256:77f0d9fa5e10d03aa4528436e33423bfa3718b86c646615f04616294c935f840",
-                "sha256:828ad813c7cdc2e71dcf141912c685bfe4b548c0e6d9540db6418b807c345ddd",
-                "sha256:85a06c61598b14b015d4df233d249cd5abfa61084ef5b9f64a48e997fd829a82",
-                "sha256:8cb4febad0f0b26c6f62e1628f2053954ad2c555d67660f28dfb1b0496711952",
-                "sha256:a5c58664b23b248b16b96253880b2868fb34358911400a7ba39d7f6399935389",
-                "sha256:aaa0f296e503cda4bc07566f592cd7a28779d433f3a23c48082af425d6d5a78f",
-                "sha256:ab235d9fe64833f12d1334d29b558aacedfbca2356dfb9691f2d0d38a8a7bfb4",
-                "sha256:b3b0c8f660fae65eac74fbf003f3103769b90012ae7a460863010539bb7a80da",
-                "sha256:bab8e6d510d2ea0f1d14f12642e3f35cefa47a9b2e4c7cea1852b52bc9c49647",
-                "sha256:c45297bbdbc8bb79b02cf41417d63352b70bcb76f1bbb1ee7d47b3e89e42f95d",
-                "sha256:d19bca47c8a01b92640c614a9147b081a1974f69168ecd494687c827109e8f42",
-                "sha256:d64b4340a0c488a9e79b66ec9f9d77d02b99b772c8b8afd46c1294c1d39ca478",
-                "sha256:da969da069a82bbb5300b59161d8d7c8d423bc4ccd3b410a9b4d8932aeefc14b",
-                "sha256:ed02c7539705696ecb7dc9d476d861f3904a8d2b7e894bd418994920935d36bb",
-                "sha256:ee5b8abc35b549012e03a7b1e86c09491457dba6c94112a2482b18589cc2bdb9"
-            ],
-            "version": "==4.5.2"
+                "sha256:08907593569fe59baca0bf152c43f3863201efb6113ecb38ce7e97ce339805a6",
+                "sha256:0be0f1ed45fc0c185cfd4ecc19a1d6532d72f86a2bac9de7e24541febad72650",
+                "sha256:141f08ed3c4b1847015e2cd62ec06d35e67a3ac185c26f7635f4406b90afa9c5",
+                "sha256:19e4df788a0581238e9390c85a7a09af39c7b539b29f25c89209e6c3e371270d",
+                "sha256:23cc09ed395b03424d1ae30dcc292615c1372bfba7141eb85e11e50efaa6b351",
+                "sha256:245388cda02af78276b479f299bbf3783ef0a6a6273037d7c60dc73b8d8d7755",
+                "sha256:331cb5115673a20fb131dadd22f5bcaf7677ef758741312bee4937d71a14b2ef",
+                "sha256:386e2e4090f0bc5df274e720105c342263423e77ee8826002dcffe0c9533dbca",
+                "sha256:3a794ce50daee01c74a494919d5ebdc23d58873747fa0e288318728533a3e1ca",
+                "sha256:60851187677b24c6085248f0a0b9b98d49cba7ecc7ec60ba6b9d2e5574ac1ee9",
+                "sha256:63a9a5fc43b58735f65ed63d2cf43508f462dc49857da70b8980ad78d41d52fc",
+                "sha256:6b62544bb68106e3f00b21c8930e83e584fdca005d4fffd29bb39fb3ffa03cb5",
+                "sha256:6ba744056423ef8d450cf627289166da65903885272055fb4b5e113137cfa14f",
+                "sha256:7494b0b0274c5072bddbfd5b4a6c6f18fbbe1ab1d22a41e99cd2d00c8f96ecfe",
+                "sha256:826f32b9547c8091679ff292a82aca9c7b9650f9fda3e2ca6bf2ac905b7ce888",
+                "sha256:93715dffbcd0678057f947f496484e906bf9509f5c1c38fc9ba3922893cda5f5",
+                "sha256:9a334d6c83dfeadae576b4d633a71620d40d1c379129d587faa42ee3e2a85cce",
+                "sha256:af7ed8a8aa6957aac47b4268631fa1df984643f07ef00acd374e456364b373f5",
+                "sha256:bf0a7aed7f5521c7ca67febd57db473af4762b9622254291fbcbb8cd0ba5e33e",
+                "sha256:bf1ef9eb901113a9805287e090452c05547578eaab1b62e4ad456fcc049a9b7e",
+                "sha256:c0afd27bc0e307a1ffc04ca5ec010a290e49e3afbe841c5cafc5c5a80ecd81c9",
+                "sha256:dd579709a87092c6dbee09d1b7cfa81831040705ffa12a1b248935274aee0437",
+                "sha256:df6712284b2e44a065097846488f66840445eb987eb81b3cc6e4149e7b6982e1",
+                "sha256:e07d9f1a23e9e93ab5c62902833bf3e4b1f65502927379148b6622686223125c",
+                "sha256:e2ede7c1d45e65e209d6093b762e98e8318ddeff95317d07a27a2140b80cfd24",
+                "sha256:e4ef9c164eb55123c62411f5936b5c2e521b12356037b6e1c2617cef45523d47",
+                "sha256:eca2b7343524e7ba246cab8ff00cab47a2d6d54ada3b02772e908a45675722e2",
+                "sha256:eee64c616adeff7db37cc37da4180a3a5b6177f5c46b187894e633f088fb5b28",
+                "sha256:ef824cad1f980d27f26166f86856efe11eff9912c4fed97d3804820d43fa550c",
+                "sha256:efc89291bd5a08855829a3c522df16d856455297cf35ae827a37edac45f466a7",
+                "sha256:fa964bae817babece5aa2e8c1af841bebb6d0b9add8e637548809d040443fee0",
+                "sha256:ff37757e068ae606659c28c3bd0d923f9d29a85de79bf25b2b34b148473b5025"
+            ],
+            "version": "==4.5.4"
         },
         "docutils": {
             "hashes": [
-                "sha256:02aec4bd92ab067f6ff27a38a38a41173bf01bed8f89157768c1573f53e474a6",
-                "sha256:51e64ef2ebfb29cae1faa133b3710143496eca21c530f3f71424d77687764274",
-                "sha256:7a4bd47eaf6596e1295ecb11361139febe29b084a87bf005bf899f9a42edc3c6"
+                "sha256:6c4f696463b79f1fb8ba0c594b63840ebd41f059e92b31957c46b74a4599b6d0",
+                "sha256:9e4d7ecfc600058e07ba661411a2b7de2fd0fafa17d1a7f7361cd47b1175c827",
+                "sha256:a2aeea129088da402665e92e0b25b04b073c04b2dce4ab65caaa38b7ce2e1a99"
             ],
-            "version": "==0.14"
+            "version": "==0.15.2"
         },
         "entrypoints": {
             "hashes": [
@@ -137,6 +138,14 @@
             ],
             "version": "==2.8"
         },
+        "importlib-metadata": {
+            "hashes": [
+                "sha256:b044f07694ef14a6683b097ba56bd081dbc7cdc7c7fe46011e499dfecc082f21",
+                "sha256:e6ac600a142cf2db707b1998382cc7fc3b02befb7273876e01b8ad10b9652742"
+            ],
+            "markers": "python_version < '3.8'",
+            "version": "==1.1.0"
+        },
         "isort": {
             "hashes": [
                 "sha256:38a74a5ccf3a15a7a99f975071164f48d4d10eed4154879009c18e6e8933e5aa",
@@ -155,11 +164,11 @@
         },
         "more-itertools": {
             "hashes": [
-                "sha256:0125e8f60e9e031347105eb1682cef932f5e97d7b9a1a28d9bf00c22a5daef40",
-                "sha256:590044e3942351a1bdb1de960b739ff4ce277960f2425ad4509446dbace8d9d1"
+                "sha256:53ff73f186307d9c8ef17a9600309154a6ae27f25579e80af4db8f047ba14bc2",
+                "sha256:a0ea684c39bc4315ba7aae406596ef191fd84f873d2d2751f84d64e81a7a2d45"
             ],
             "markers": "python_version > '2.7'",
-            "version": "==6.0.0"
+            "version": "==8.0.0"
         },
         "mypy": {
             "hashes": [
@@ -171,10 +180,10 @@
         },
         "mypy-extensions": {
             "hashes": [
-                "sha256:37e0e956f41369209a3d5f34580150bcacfabaa57b33a15c0b25f4b5725e0812",
-                "sha256:b16cabe759f55e3409a7d231ebd2841378fb0c27a5d1994719e340e4f429ac3e"
+                "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d",
+                "sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8"
             ],
-            "version": "==0.4.1"
+            "version": "==0.4.3"
         },
         "pep8-naming": {
             "hashes": [
@@ -193,10 +202,10 @@
         },
         "pluggy": {
             "hashes": [
-                "sha256:19ecf9ce9db2fce065a7a0586e07cfb4ac8614fe96edf628a264b1c70116cf8f",
-                "sha256:84d306a647cc805219916e62aab89caa97a33a1dd8c342e87a37f91073cd4746"
+                "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
+                "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
             ],
-            "version": "==0.9.0"
+            "version": "==0.13.1"
         },
         "py": {
             "hashes": [
@@ -207,9 +216,9 @@
         },
         "py-cpuinfo": {
             "hashes": [
-                "sha256:6615d4527118d4ea1db4d86dac4340725b3906aa04bf36b7902f7af4425fb25f"
+                "sha256:2cf6426f776625b21d1db8397d3297ef7acfa59018f02a8779123f3190f18500"
             ],
-            "version": "==4.0.0"
+            "version": "==5.0.0"
         },
         "pycodestyle": {
             "hashes": [
@@ -236,10 +245,10 @@
         },
         "pygments": {
             "hashes": [
-                "sha256:5ffada19f6203563680669ee7f53b64dabbeb100eb51b61996085e99c03b284a",
-                "sha256:e8218dd399a61674745138520d0d4cf2621d7e032439341bc3f647bff125818d"
+                "sha256:2a3fe295e54a20164a9df49c75fa58526d3be48e14aceba6d6b1e8ac0bfd6f1b",
+                "sha256:98c8aa5a9f778fcd1026a17361ddaf7330d1b7c62ae97c3bb0ae73e0b9b6b0fe"
             ],
-            "version": "==2.3.1"
+            "version": "==2.5.2"
         },
         "pytest": {
             "hashes": [
@@ -274,10 +283,10 @@
         },
         "requests": {
             "hashes": [
-                "sha256:502a824f31acdacb3a35b6690b5fbf0bc41d63a24a45c4004352b0242707598e",
-                "sha256:7bf2a778576d825600030a110f3c0e3e8edc51dfaafe1c146e39a2027784957b"
+                "sha256:11e007a8a2aa0323f5a921e9e6a2d7e4e67d9877e85773fba9ba6419025cbeb4",
+                "sha256:9cf5292fcd0f598c671cfc1e0d7d1a7f13bb8085e9a590f48c010551dc6c4b31"
             ],
-            "version": "==2.21.0"
+            "version": "==2.22.0"
         },
         "requests-toolbelt": {
             "hashes": [
@@ -288,24 +297,24 @@
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:1f1b7d42e254082a9db6279deae68afb421ceba6158efa6131de7b3003ee93fd",
+                "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"
             ],
-            "version": "==1.12.0"
+            "version": "==1.13.0"
         },
         "snowballstemmer": {
             "hashes": [
-                "sha256:919f26a68b2c17a7634da993d91339e288964f93c274f1343e3bbbe2096e1128",
-                "sha256:9f3bcd3c401c3e862ec0ebe6d2c069ebc012ce142cce209c098ccb5b09136e89"
+                "sha256:209f257d7533fdb3cb73bdbd24f436239ca3b2fa67d56f6ff88e86be08cc5ef0",
+                "sha256:df3bac3df4c2c01363f3dd2cfa78cce2840a79b9f1c2d2de9ce8d31683992f52"
             ],
-            "version": "==1.2.1"
+            "version": "==2.0.0"
         },
         "tqdm": {
             "hashes": [
-                "sha256:d385c95361699e5cf7622485d9b9eae2d4864b21cd5a2374a9c381ffed701021",
-                "sha256:e22977e3ebe961f72362f6ddfb9197cc531c9737aaf5f607ef09740c849ecd05"
+                "sha256:156a0565f09d1f0ef8242932a0e1302462c93827a87ba7b4423d90f01befe94c",
+                "sha256:c0ffb55959ea5f3eaeece8d2db0651ba9ced9c72f40a6cce3419330256234289"
             ],
-            "version": "==4.31.1"
+            "version": "==4.40.0"
         },
         "twine": {
             "hashes": [
@@ -317,27 +326,28 @@
         },
         "typed-ast": {
             "hashes": [
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-                "sha256:af5fbdde0690c7da68e841d7fc2632345d570768ea7406a9434446d7b33b0ee1",
-                "sha256:b64efdbdf3bbb1377562c179f167f3bf301251411eb5ac77dec6b7d32bcda463",
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-            ],
-            "version": "==1.3.1"
+                "sha256:01afc9431f6a3285232915dcbff935937f0271196ed9b52f710bfe6013630554",
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+                "sha256:2c4a37edd1cd2b01aba51c2b92eb5b330cf5789e2484a42dd04a7795695450a2",
+                "sha256:6a338cd66cb4cb1f5477d36d363d6fdfe8a552a2b0a485a36f1857ae79a6a0c7",
+                "sha256:731f448d6dd9f055d7efd948e497c48d6a5aa681a16703ef1cd1f8023b180db3",
+                "sha256:9371921a5fc80e553d4a22fc4509ae543b157215d3a936f8fc649723d66305c2",
+                "sha256:9401857bf5eef5c2fe040a6dce5b3b41df7234dfbcb37585ca32aaa49283ab57",
+                "sha256:b549870747445aeb6596c7b0be22a127d7e2ff5293be56283ed64dfce8238546",
+                "sha256:bc4a61473c78d5f1b67c67f8504b7433d3ef1bc6e1c6a89e7c583ba1c8b9e6ee",
+                "sha256:be981e1f1a205721df63e8a3d8f46d18f3fcfa5a5b7394d95d253fff3594e059",
+                "sha256:c924149ae964d0379322121868c34c1580cc7054374daac27d97652d69af9973",
+                "sha256:c98a849da29147e7160d84011764a23bca8c3c3b4e7568bf172fdf6147d40e25",
+                "sha256:cca01d308c725013e555db9413ab4046323e9685f6fa67555f98f08cb4849200",
+                "sha256:d13420d91ce835fe3a8fdfd096f0ca71bf5f47761c10ba893d31f99564650e6b",
+                "sha256:d4cdcf7d0a37ebde934ec91e691c638c0272a310fbdb31a51757436a5bd58967",
+                "sha256:fcfc4869bcd15eb7b90baceb50bfaf1cdfea4a9c2bfa50db17114c6665ca835e"
+            ],
+            "index": "pypi",
+            "version": "==1.3.2"
         },
         "typeshed": {
             "hashes": [
@@ -349,10 +359,10 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:61bf29cada3fc2fbefad4fdf059ea4bd1b4a86d2b6d15e1c7c0b582b9752fe39",
-                "sha256:de9529817c93f27c8ccbfead6985011db27bd0ddfcdb2d86f3f663385c6a9c22"
+                "sha256:a8a318824cc77d1fd4b2bec2ded92646630d7fe8619497b142c84a9e6f5a7293",
+                "sha256:f3c5fd51747d450d4dcf6f923c81f78f811aab8205fda64b0aba34a4e48b0745"
             ],
-            "version": "==1.24.1"
+            "version": "==1.25.7"
         },
         "webencodings": {
             "hashes": [
@@ -368,6 +378,13 @@
             ],
             "index": "pypi",
             "version": "==0.26.0"
+        },
+        "zipp": {
+            "hashes": [
+                "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e",
+                "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"
+            ],
+            "version": "==0.6.0"
         }
     }
 }