diff --git a/Pipfile.lock b/Pipfile.lock
index d3afc2f..6024491 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -244,90 +244,68 @@
             ],
             "version": "==7.0"
         },
-        "colorama": {
-            "hashes": [
-                "sha256:05eed71e2e327246ad6b38c540c4a3117230b19679b875190486ddd2d721422d",
-                "sha256:f8ac84de7840f5b9c4e3347b3c1eaa50f7e49c2b07596221daec5edaabbd7c48"
-            ],
-            "markers": "sys_platform == 'win32'",
-            "version": "==0.4.1"
-        },
         "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"
+                "sha256:0402b1822d513d0231589494bceddb067d20581f5083598c451b56c684b0e5d6",
+                "sha256:0644e28e8aea9d9d563607ee8b7071b07dd57a4a3de11f8684cd33c51c0d1b93",
+                "sha256:0874a283686803884ec0665018881130604956dbaa344f2539c46d82cbe29eda",
+                "sha256:0988c3837df4bc371189bb3425d5232cf150055452034c232dda9cbe04f9c38e",
+                "sha256:20bc3205b3100956bb72293fabb97f0ed972c81fed10b3251c90c70dcb0599ab",
+                "sha256:2cc9142a3367e74eb6b19d58c53ebb1dfd7336b91cdcc91a6a2888bf8c7af984",
+                "sha256:3ae9a0a59b058ce0761c3bd2c2d66ecb2ee2b8ac592620184370577f7a546fb3",
+                "sha256:3b2e30b835df58cb973f478d09f3d82e90c98c8e5059acc245a8e4607e023801",
+                "sha256:401e9b04894eb1498c639c6623ee78a646990ce5f095248e2440968aafd6e90e",
+                "sha256:41ec5812d5decdaa72708be3018e7443e90def4b5a71294236a4df192cf9eab9",
+                "sha256:475769b638a055e75b3d3219e054fe2a023c0b077ff15bff6c95aba7e93e6cac",
+                "sha256:61424f4e2e82c4129a4ba71e10ebacb32a9ecd6f80de2cd05bdead6ba75ed736",
+                "sha256:811969904d4dd0bee7d958898be8d9d75cef672d9b7e7db819dfeac3d20d2d0c",
+                "sha256:86224bb99abfd672bf2f9fcecad5e8d7a3fa94f7f71513f2210460a0350307cd",
+                "sha256:9a238a20a3af00665f8381f7e53e9c606f9bb652d2423f6b822f6cb790d887e8",
+                "sha256:a23b3fbc14d4e6182ecebfd22f3729beef0636d151d94764a1c28330d185e4e5",
+                "sha256:ac162b4ebe51b7a2b7f5e462c4402802633eb81e77c94f8a7c1ed8a556e72c75",
+                "sha256:b6187378726c84365bf297b5dcdae8789b6a5823b200bea23797777e5a63be09",
+                "sha256:bcd5723d905ed4a825f17410a53535f880b6d7548ae3d89078db7b1ceefcd853",
+                "sha256:c48a4f9c5fb385269bb7fbaf9c1326a94863b65ec7f5c96b2ea56b252f01ad08",
+                "sha256:cd40199d6f1c29c85b170d25589be9a97edff8ee7e62be180a2a137823896030",
+                "sha256:d1bc331a7d069485ac1d8c25a0ea1f6aab6cb2a87146fb652222481c1bddc9ff",
+                "sha256:d7e0cdc249aa0f94aa2e531b03999ddaf03a10b4fa090a894712d4c8066abd89",
+                "sha256:e9ee8fcd8e067fcc5d7276d46e07e863102b70a52545ef4254df1ff0893ce75f",
+                "sha256:eb313c23d983b7810504f42104e8dcd1c7ccdda8fbaab82aab92ab79fea19345",
+                "sha256:f9cfd478654b509941b85ed70f870f5e3c74678f566bec12fd26545e5340ba47",
+                "sha256:fae1fa144034d021a52cb9ea200eb8dedf91869c6df8202ad5d149b41ed91cc8"
             ],
             "index": "pypi",
-            "version": "==5.0a4"
+            "version": "==5.0a5"
         },
         "isort": {
             "hashes": [
-                "sha256:18c796c2cd35eb1a1d3f012a214a542790a1aed95e29768bdcb9f2197eccbd0b",
-                "sha256:96151fca2c6e736503981896495d344781b60d18bfda78dc11b290c6125ebdb6"
+                "sha256:c40744b6bc5162bbb39c1257fe298b7a393861d50978b565f3ccd9cb9de0182a",
+                "sha256:f57abacd059dc3bd666258d1efb0377510a89777fda3e3274e3c01f7c03ae22d"
             ],
-            "version": "==4.3.15"
+            "version": "==4.3.20"
         },
         "lazy-object-proxy": {
             "hashes": [
-                "sha256:0ce34342b419bd8f018e6666bfef729aec3edf62345a53b537a4dcc115746a33",
-                "sha256:1b668120716eb7ee21d8a38815e5eb3bb8211117d9a90b0f8e21722c0758cc39",
-                "sha256:209615b0fe4624d79e50220ce3310ca1a9445fd8e6d3572a896e7f9146bbf019",
-                "sha256:27bf62cb2b1a2068d443ff7097ee33393f8483b570b475db8ebf7e1cba64f088",
-                "sha256:27ea6fd1c02dcc78172a82fc37fcc0992a94e4cecf53cb6d73f11749825bd98b",
-                "sha256:2c1b21b44ac9beb0fc848d3993924147ba45c4ebc24be19825e57aabbe74a99e",
-                "sha256:2df72ab12046a3496a92476020a1a0abf78b2a7db9ff4dc2036b8dd980203ae6",
-                "sha256:320ffd3de9699d3892048baee45ebfbbf9388a7d65d832d7e580243ade426d2b",
-                "sha256:50e3b9a464d5d08cc5227413db0d1c4707b6172e4d4d915c1c70e4de0bbff1f5",
-                "sha256:5276db7ff62bb7b52f77f1f51ed58850e315154249aceb42e7f4c611f0f847ff",
-                "sha256:61a6cf00dcb1a7f0c773ed4acc509cb636af2d6337a08f362413c76b2b47a8dd",
-                "sha256:6ae6c4cb59f199d8827c5a07546b2ab7e85d262acaccaacd49b62f53f7c456f7",
-                "sha256:7661d401d60d8bf15bb5da39e4dd72f5d764c5aff5a86ef52a042506e3e970ff",
-                "sha256:7bd527f36a605c914efca5d3d014170b2cb184723e423d26b1fb2fd9108e264d",
-                "sha256:7cb54db3535c8686ea12e9535eb087d32421184eacc6939ef15ef50f83a5e7e2",
-                "sha256:7f3a2d740291f7f2c111d86a1c4851b70fb000a6c8883a59660d95ad57b9df35",
-                "sha256:81304b7d8e9c824d058087dcb89144842c8e0dea6d281c031f59f0acf66963d4",
-                "sha256:933947e8b4fbe617a51528b09851685138b49d511af0b6c0da2539115d6d4514",
-                "sha256:94223d7f060301b3a8c09c9b3bc3294b56b2188e7d8179c762a1cda72c979252",
-                "sha256:ab3ca49afcb47058393b0122428358d2fbe0408cf99f1b58b295cfeb4ed39109",
-                "sha256:bd6292f565ca46dee4e737ebcc20742e3b5be2b01556dafe169f6c65d088875f",
-                "sha256:c0e2945ebf5b6eb32848e9bd6f850f558722caf7ae9427c9fff8e0ea7b185a2f",
-                "sha256:cb924aa3e4a3fb644d0c463cad5bc2572649a6a3f68a7f8e4fbe44aaa6d77e4c",
-                "sha256:d0fc7a286feac9077ec52a927fc9fe8fe2fabab95426722be4c953c9a8bede92",
-                "sha256:ddc34786490a6e4ec0a855d401034cbd1242ef186c20d79d2166d6a4bd449577",
-                "sha256:e34b155e36fa9da7e1b7c738ed7767fc9491a62ec6af70fe9da4a057759edc2d",
-                "sha256:e5b9e8f6bda48460b7b143c3821b21b452cb3a835e6bbd5dd33aa0c8d3f5137d",
-                "sha256:e81ebf6c5ee9684be8f2c87563880f93eedd56dd2b6146d8a725b50b7e5adb0f",
-                "sha256:eb91be369f945f10d3a49f5f9be8b3d0b93a4c2be8f8a5b83b0571b8123e0a7a",
-                "sha256:f460d1ceb0e4a5dcb2a652db0904224f367c9b3c1470d5a7683c0480e582468b"
+                "sha256:159a745e61422217881c4de71f9eafd9d703b93af95618635849fe469a283661",
+                "sha256:23f63c0821cc96a23332e45dfaa83266feff8adc72b9bcaef86c202af765244f",
+                "sha256:3b11be575475db2e8a6e11215f5aa95b9ec14de658628776e10d96fa0b4dac13",
+                "sha256:3f447aff8bc61ca8b42b73304f6a44fa0d915487de144652816f950a3f1ab821",
+                "sha256:4ba73f6089cd9b9478bc0a4fa807b47dbdb8fad1d8f31a0f0a5dbf26a4527a71",
+                "sha256:4f53eadd9932055eac465bd3ca1bd610e4d7141e1278012bd1f28646aebc1d0e",
+                "sha256:64483bd7154580158ea90de5b8e5e6fc29a16a9b4db24f10193f0c1ae3f9d1ea",
+                "sha256:6f72d42b0d04bfee2397aa1862262654b56922c20a9bb66bb76b6f0e5e4f9229",
+                "sha256:7c7f1ec07b227bdc561299fa2328e85000f90179a2f44ea30579d38e037cb3d4",
+                "sha256:7c8b1ba1e15c10b13cad4171cfa77f5bb5ec2580abc5a353907780805ebe158e",
+                "sha256:8559b94b823f85342e10d3d9ca4ba5478168e1ac5658a8a2f18c991ba9c52c20",
+                "sha256:a262c7dfb046f00e12a2bdd1bafaed2408114a89ac414b0af8755c696eb3fc16",
+                "sha256:acce4e3267610c4fdb6632b3886fe3f2f7dd641158a843cf6b6a68e4ce81477b",
+                "sha256:be089bb6b83fac7f29d357b2dc4cf2b8eb8d98fe9d9ff89f9ea6012970a853c7",
+                "sha256:bfab710d859c779f273cc48fb86af38d6e9210f38287df0069a63e40b45a2f5c",
+                "sha256:c10d29019927301d524a22ced72706380de7cfc50f767217485a912b4c8bd82a",
+                "sha256:dd6e2b598849b3d7aee2295ac765a578879830fb8966f70be8cd472e6069932e",
+                "sha256:e408f1eacc0a68fed0c08da45f31d0ebb38079f043328dce69ff133b95c29dc1"
             ],
-            "version": "==1.3.1"
+            "version": "==1.4.1"
         },
         "mccabe": {
             "hashes": [
@@ -338,11 +316,11 @@
         },
         "mock": {
             "hashes": [
-                "sha256:5ce3c71c5545b472da17b72268978914d0252980348636840bd34a00b5cc96c1",
-                "sha256:b158b6df76edd239b8208d481dc46b6afd45a846b7812ff0ce58971cf5bc8bba"
+                "sha256:83657d894c90d5681d62155c82bda9c1187827525880eda8ff5df4ec813437c3",
+                "sha256:d157e52d4e5b938c550f39eb2fd15610db062441a9c2747d3dbfa9298211d0f8"
             ],
             "index": "pypi",
-            "version": "==2.0.0"
+            "version": "==3.0.5"
         },
         "nose": {
             "hashes": [
@@ -353,13 +331,6 @@
             "index": "pypi",
             "version": "==1.3.7"
         },
-        "pbr": {
-            "hashes": [
-                "sha256:8257baf496c8522437e8a6cfe0f15e00aedc6c0e0e7c9d55eeeeab31e0853843",
-                "sha256:8c361cc353d988e4f5b998555c88098b9d5964c2e11acf7b0d21925a66bb5824"
-            ],
-            "version": "==5.1.3"
-        },
         "pylint": {
             "hashes": [
                 "sha256:5d77031694a5fb97ea95e828c8d10fc770a1df6eb3906067aaed42201a8a6a09",
@@ -384,33 +355,32 @@
         },
         "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"
+                "sha256:132eae51d6ef3ff4a8c47c393a4ef5ebf0d1aecc96880eb5d6c8ceab7017cc9b",
+                "sha256:18141c1484ab8784006c839be8b985cfc82a2e9725837b0ecfa0203f71c4e39d",
+                "sha256:2baf617f5bbbfe73fd8846463f5aeafc912b5ee247f410700245d68525ec584a",
+                "sha256:3d90063f2cbbe39177e9b4d888e45777012652d6110156845b828908c51ae462",
+                "sha256:4304b2218b842d610aa1a1d87e1dc9559597969acc62ce717ee4dfeaa44d7eee",
+                "sha256:4983ede548ffc3541bae49a82675996497348e55bafd1554dc4e4a5d6eda541a",
+                "sha256:5315f4509c1476718a4825f45a203b82d7fdf2a6f5f0c8f166435975b1c9f7d4",
+                "sha256:6cdfb1b49d5345f7c2b90d638822d16ba62dc82f7616e9b4caa10b72f3f16649",
+                "sha256:7b325f12635598c604690efd7a0197d0b94b7d7778498e76e0710cd582fd1c7a",
+                "sha256:8d3b0e3b8626615826f9a626548057c5275a9733512b137984a68ba1598d3d2f",
+                "sha256:8f8631160c79f53081bd23446525db0bc4c5616f78d04021e6e434b286493fd7",
+                "sha256:912de10965f3dc89da23936f1cc4ed60764f712e5fa603a09dd904f88c996760",
+                "sha256:b010c07b975fe853c65d7bbe9d4ac62f1c69086750a574f6292597763781ba18",
+                "sha256:c908c10505904c48081a5415a1e295d8403e353e0c14c42b6d67f8f97fae6616",
+                "sha256:c94dd3807c0c0610f7c76f078119f4ea48235a953512752b9175f9f98f5ae2bd",
+                "sha256:ce65dee7594a84c466e79d7fb7d3303e7295d16a83c22c7c4037071b059e2c21",
+                "sha256:eaa9cfcb221a8a4c2889be6f93da141ac777eb8819f077e1d09fb12d00a09a93",
+                "sha256:f3376bc31bad66d46d44b4e6522c5c21976bf9bca4ef5987bb2bf727f4506cbb",
+                "sha256:f9202fa138544e13a4ec1a6792c35834250a85958fde1251b6a22e07d1260ae7"
             ],
             "markers": "implementation_name == 'cpython'",
-            "version": "==1.3.1"
+            "version": "==1.3.5"
         },
         "wrapt": {
             "hashes": [
-                "sha256:4aea003270831cceb8a90ff27c4031da6ead7ec1886023b80ce0dfe0adf61533",
-                "sha256:71ad0a3729a2f29eb25ff0dd6e66fc9768c749ff0c3f8899a6ac35c059f502c1"
+                "sha256:4aea003270831cceb8a90ff27c4031da6ead7ec1886023b80ce0dfe0adf61533"
             ],
             "version": "==1.11.1"
         }