diff --git a/Pipfile.lock b/Pipfile.lock
index 9331365..794ccb1 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"
         },
         "autopep8": {
             "hashes": [
@@ -45,17 +45,17 @@
         },
         "babel": {
             "hashes": [
-                "sha256:6778d85147d5d85345c14a26aada5e478ab04e39b078b0745ee6870c2b5cf669",
-                "sha256:8cba50f48c529ca3fa18cf81fa9403be176d374ac4d60738b839122dfaaa3d23"
+                "sha256:af92e6106cb7c55286b25b38ad7695f8b4efb36a90ba483d7f7a6628c46158ab",
+                "sha256:e86135ae101e31e2c8ec20a4e0c5220f4eed12487d5cf3f78be7e98d3a57fc28"
             ],
-            "version": "==2.6.0"
+            "version": "==2.7.0"
         },
         "certifi": {
             "hashes": [
-                "sha256:59b7658e26ca9c7339e00f8f4636cdfe59d34fa37b9b04f6f9e9926b3cece1a5",
-                "sha256:b26104d6835d1f5e49452a26eb2ff87fe7090b89dfcaee5ea2212697e1e1d7ae"
+                "sha256:017c25db2a153ce562900032d5bc68e9f191e44e9a0f762f373977de9df1fbb3",
+                "sha256:25b64c7da4cd7479594d035c08c2d809eb4aab3a26e5a990ea98cc450c320f1f"
             ],
-            "version": "==2019.3.9"
+            "version": "==2019.11.28"
         },
         "chardet": {
             "hashes": [
@@ -103,11 +103,11 @@
         },
         "docutils": {
             "hashes": [
-                "sha256:02aec4bd92ab067f6ff27a38a38a41173bf01bed8f89157768c1573f53e474a6",
-                "sha256:51e64ef2ebfb29cae1faa133b3710143496eca21c530f3f71424d77687764274",
-                "sha256:7a4bd47eaf6596e1295ecb11361139febe29b084a87bf005bf899f9a42edc3c6"
+                "sha256:6c4f696463b79f1fb8ba0c594b63840ebd41f059e92b31957c46b74a4599b6d0",
+                "sha256:9e4d7ecfc600058e07ba661411a2b7de2fd0fafa17d1a7f7361cd47b1175c827",
+                "sha256:a2aeea129088da402665e92e0b25b04b073c04b2dce4ab65caaa38b7ce2e1a99"
             ],
-            "version": "==0.14"
+            "version": "==0.15.2"
         },
         "entrypoints": {
             "hashes": [
@@ -118,10 +118,10 @@
         },
         "filelock": {
             "hashes": [
-                "sha256:b8d5ca5ca1c815e1574aee746650ea7301de63d87935b3463d26368b76e31633",
-                "sha256:d610c1bb404daf85976d7a82eb2ada120f04671007266b708606565dd03b5be6"
+                "sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59",
+                "sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836"
             ],
-            "version": "==3.0.10"
+            "version": "==3.0.12"
         },
         "flake8": {
             "hashes": [
@@ -155,10 +155,10 @@
         },
         "jinja2": {
             "hashes": [
-                "sha256:065c4f02ebe7f7cf559e49ee5a95fb800a9e4528727aec6f24402a5374c65013",
-                "sha256:14dd6caf1527abb21f08f86c784eac40853ba93edb79552aa1e4b8aef1b61c7b"
+                "sha256:74320bb91f31270f9551d46522e33af46a80c3d619f4a4bf42b3164d30b5911f",
+                "sha256:9fe95f19286cfefaa917656583d020be14e7859c6b0252588391e47db34527de"
             ],
-            "version": "==2.10.1"
+            "version": "==2.10.3"
         },
         "markupsafe": {
             "hashes": [
@@ -202,11 +202,11 @@
         },
         "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": [
@@ -227,24 +227,24 @@
         },
         "mypy-extensions": {
             "hashes": [
-                "sha256:37e0e956f41369209a3d5f34580150bcacfabaa57b33a15c0b25f4b5725e0812",
-                "sha256:b16cabe759f55e3409a7d231ebd2841378fb0c27a5d1994719e340e4f429ac3e"
+                "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d",
+                "sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8"
             ],
-            "version": "==0.4.1"
+            "version": "==0.4.3"
         },
         "packaging": {
             "hashes": [
-                "sha256:0c98a5d0be38ed775798ece1b9727178c4469d9c3b4ada66e8e6b7849f8732af",
-                "sha256:9e1cbf8c12b1f1ce0bb5344b8d7ecf66a6f8a6e91bcb0c84593ed6d3ab5c4ab3"
+                "sha256:28b924174df7a2fa32c1953825ff29c61e2f5e082343165438812f00d3a7fc47",
+                "sha256:d9551545c6d761f3def1677baf08ab2a3ca17c56879e70fecba2fc4dde4ed108"
             ],
-            "version": "==19.0"
+            "version": "==19.2"
         },
         "pluggy": {
             "hashes": [
-                "sha256:19ecf9ce9db2fce065a7a0586e07cfb4ac8614fe96edf628a264b1c70116cf8f",
-                "sha256:84d306a647cc805219916e62aab89caa97a33a1dd8c342e87a37f91073cd4746"
+                "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
+                "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
             ],
-            "version": "==0.9.0"
+            "version": "==0.13.1"
         },
         "py": {
             "hashes": [
@@ -269,17 +269,17 @@
         },
         "pygments": {
             "hashes": [
-                "sha256:5ffada19f6203563680669ee7f53b64dabbeb100eb51b61996085e99c03b284a",
-                "sha256:e8218dd399a61674745138520d0d4cf2621d7e032439341bc3f647bff125818d"
+                "sha256:2a3fe295e54a20164a9df49c75fa58526d3be48e14aceba6d6b1e8ac0bfd6f1b",
+                "sha256:98c8aa5a9f778fcd1026a17361ddaf7330d1b7c62ae97c3bb0ae73e0b9b6b0fe"
             ],
-            "version": "==2.3.1"
+            "version": "==2.5.2"
         },
         "pyparsing": {
             "hashes": [
-                "sha256:1873c03321fc118f4e9746baf201ff990ceb915f433f23b395f5580d1840cb2a",
-                "sha256:9b6323ef4ab914af344ba97510e966d64ba91055d6b9afa6b30799340e89cc03"
+                "sha256:20f995ecd72f2a1f4bf6b072b63b22e2eb457836601e76d6e5dfcd75436acc1f",
+                "sha256:4ca62001be367f01bd3e92ecbb79070272a9d4964dce6a48a82ff0b8bc7e683a"
             ],
-            "version": "==2.4.0"
+            "version": "==2.4.5"
         },
         "pytest": {
             "hashes": [
@@ -295,31 +295,31 @@
         },
         "pytz": {
             "hashes": [
-                "sha256:303879e36b721603cc54604edcac9d20401bdbe31e1e4fdee5b9f98d5d31dfda",
-                "sha256:d747dd3d23d77ef44c6a3526e274af6efeb0a6f1afd5a69ba4d5be4098c8e141"
+                "sha256:1c557d7d0e871de1f5ccd5833f60fb2550652da6be2693c1e02300743d21500d",
+                "sha256:b02c06db6cf09c12dd25137e563b31700d3b80fcc4ad23abb7a315f2789819be"
             ],
-            "version": "==2019.1"
+            "version": "==2019.3"
         },
         "requests": {
             "hashes": [
-                "sha256:502a824f31acdacb3a35b6690b5fbf0bc41d63a24a45c4004352b0242707598e",
-                "sha256:7bf2a778576d825600030a110f3c0e3e8edc51dfaafe1c146e39a2027784957b"
+                "sha256:11e007a8a2aa0323f5a921e9e6a2d7e4e67d9877e85773fba9ba6419025cbeb4",
+                "sha256:9cf5292fcd0f598c671cfc1e0d7d1a7f13bb8085e9a590f48c010551dc6c4b31"
             ],
-            "version": "==2.21.0"
+            "version": "==2.22.0"
         },
         "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"
         },
         "sphinx": {
             "hashes": [
@@ -388,41 +388,42 @@
         },
         "typed-ast": {
             "hashes": [
-                "sha256:035a54ede6ce1380599b2ce57844c6554666522e376bd111eb940fbc7c3dad23",
-                "sha256:037c35f2741ce3a9ac0d55abfcd119133cbd821fffa4461397718287092d9d15",
-                "sha256:049feae7e9f180b64efacbdc36b3af64a00393a47be22fa9cb6794e68d4e73d3",
-                "sha256:19228f7940beafc1ba21a6e8e070e0b0bfd1457902a3a81709762b8b9039b88d",
-                "sha256:2ea681e91e3550a30c2265d2916f40a5f5d89b59469a20f3bad7d07adee0f7a6",
-                "sha256:3a6b0a78af298d82323660df5497bcea0f0a4a25a0b003afd0ce5af049bd1f60",
-                "sha256:5385da8f3b801014504df0852bf83524599df890387a3c2b17b7caa3d78b1773",
-                "sha256:606d8afa07eef77280c2bf84335e24390055b478392e1975f96286d99d0cb424",
-                "sha256:69245b5b23bbf7fb242c9f8f08493e9ecd7711f063259aefffaeb90595d62287",
-                "sha256:6f6d839ab09830d59b7fa8fb6917023d8cb5498ee1f1dbd82d37db78eb76bc99",
-                "sha256:730888475f5ac0e37c1de4bd05eeb799fdb742697867f524dc8a4cd74bcecc23",
-                "sha256:9819b5162ffc121b9e334923c685b0d0826154e41dfe70b2ede2ce29034c71d8",
-                "sha256:9e60ef9426efab601dd9aa120e4ff560f4461cf8442e9c0a2b92548d52800699",
-                "sha256:af5fbdde0690c7da68e841d7fc2632345d570768ea7406a9434446d7b33b0ee1",
-                "sha256:b64efdbdf3bbb1377562c179f167f3bf301251411eb5ac77dec6b7d32bcda463",
-                "sha256:bac5f444c118aeb456fac1b0b5d14c6a71ea2a42069b09c176f75e9bd4c186f6",
-                "sha256:bda9068aafb73859491e13b99b682bd299c1b5fd50644d697533775828a28ee0",
-                "sha256:d659517ca116e6750101a1326107d3479028c5191f0ecee3c7203c50f5b915b0",
-                "sha256:eddd3fb1f3e0f82e5915a899285a39ee34ce18fd25d89582bc89fc9fb16cd2c6"
-            ],
-            "version": "==1.3.1"
+                "sha256:01afc9431f6a3285232915dcbff935937f0271196ed9b52f710bfe6013630554",
+                "sha256:1755020d865dd621393d0453a93530e87c091aef7564189b945eee86a34df617",
+                "sha256:1d9549f424d59742a4a598a4b23393e2771e32ba8c6ab2655ca186673eacbcc4",
+                "sha256:23083f23c44782e6849cb58e8a8c113597fd46120209f34a2a5891384645cc56",
+                "sha256:244bc007c2da0750e323657da76dab686327939fe4ff77b23ce49a01b0a85da7",
+                "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"
         },
         "urllib3": {
             "hashes": [
-                "sha256:61bf29cada3fc2fbefad4fdf059ea4bd1b4a86d2b6d15e1c7c0b582b9752fe39",
-                "sha256:de9529817c93f27c8ccbfead6985011db27bd0ddfcdb2d86f3f663385c6a9c22"
+                "sha256:a8a318824cc77d1fd4b2bec2ded92646630d7fe8619497b142c84a9e6f5a7293",
+                "sha256:f3c5fd51747d450d4dcf6f923c81f78f811aab8205fda64b0aba34a4e48b0745"
             ],
-            "version": "==1.24.1"
+            "version": "==1.25.7"
         },
         "virtualenv": {
             "hashes": [
-                "sha256:6aebaf4dd2568a0094225ebbca987859e369e3e5c22dc7d52e5406d504890417",
-                "sha256:984d7e607b0a5d1329425dd8845bd971b957424b5ba664729fab51ab8c11bc39"
+                "sha256:116655188441670978117d0ebb6451eb6a7526f9ae0796cc0dee6bd7356909b0",
+                "sha256:b57776b44f91511866594e477dd10e76a6eb44439cdd7f06dcd30ba4c5bd854f"
             ],
-            "version": "==16.4.3"
+            "version": "==16.7.8"
         }
     }
 }