diff --git a/Pipfile.lock b/Pipfile.lock
index 3e46372..1edc092 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -214,32 +214,29 @@
         },
         "mypy": {
             "hashes": [
-                "sha256:088cd9c7904b4ad80bec811053272986611b84221835e079be5bcad029e79dd9",
-                "sha256:0aadfb2d3935988ec3815952e44058a3100499f5be5b28c34ac9d79f002a4a9a",
-                "sha256:119bed3832d961f3a880787bf621634ba042cb8dc850a7429f643508eeac97b9",
-                "sha256:1a85e280d4d217150ce8cb1a6dddffd14e753a4e0c3cf90baabb32cefa41b59e",
-                "sha256:3c4b8ca36877fc75339253721f69603a9c7fdb5d4d5a95a1a1b899d8b86a4de2",
-                "sha256:3e382b29f8e0ccf19a2df2b29a167591245df90c0b5a2542249873b5c1d78212",
-                "sha256:42c266ced41b65ed40a282c575705325fa7991af370036d3f134518336636f5b",
-                "sha256:53fd2eb27a8ee2892614370896956af2ff61254c275aaee4c230ae771cadd885",
-                "sha256:704098302473cb31a218f1775a873b376b30b4c18229421e9e9dc8916fd16150",
-                "sha256:7df1ead20c81371ccd6091fa3e2878559b5c4d4caadaf1a484cf88d93ca06703",
-                "sha256:866c41f28cee548475f146aa4d39a51cf3b6a84246969f3759cb3e9c742fc072",
-                "sha256:a155d80ea6cee511a3694b108c4494a39f42de11ee4e61e72bc424c490e46457",
-                "sha256:adaeee09bfde366d2c13fe6093a7df5df83c9a2ba98638c7d76b010694db760e",
-                "sha256:b6fb13123aeef4a3abbcfd7e71773ff3ff1526a7d3dc538f3929a49b42be03f0",
-                "sha256:b94e4b785e304a04ea0828759172a15add27088520dc7e49ceade7834275bedb",
-                "sha256:c0df2d30ed496a08de5daed2a9ea807d07c21ae0ab23acf541ab88c24b26ab97",
-                "sha256:c6c2602dffb74867498f86e6129fd52a2770c48b7cd3ece77ada4fa38f94eba8",
-                "sha256:ceb6e0a6e27fb364fb3853389607cf7eb3a126ad335790fa1e14ed02fba50811",
-                "sha256:d9dd839eb0dc1bbe866a288ba3c1afc33a202015d2ad83b31e875b5905a079b6",
-                "sha256:e4dab234478e3bd3ce83bac4193b2ecd9cf94e720ddd95ce69840273bf44f6de",
-                "sha256:ec4e0cd079db280b6bdabdc807047ff3e199f334050db5cbb91ba3e959a67504",
-                "sha256:ecd2c3fe726758037234c93df7e98deb257fd15c24c9180dacf1ef829da5f921",
-                "sha256:ef565033fa5a958e62796867b1df10c40263ea9ded87164d67572834e57a174d"
+                "sha256:0038b21890867793581e4cb0d810829f5fd4441aa75796b53033af3aa30430ce",
+                "sha256:1171f2e0859cfff2d366da2c7092b06130f232c636a3f7301e3feb8b41f6377d",
+                "sha256:1b06268df7eb53a8feea99cbfff77a6e2b205e70bf31743e786678ef87ee8069",
+                "sha256:1b65714dc296a7991000b6ee59a35b3f550e0073411ac9d3202f6516621ba66c",
+                "sha256:1bf752559797c897cdd2c65f7b60c2b6969ffe458417b8d947b8340cc9cec08d",
+                "sha256:300717a07ad09525401a508ef5d105e6b56646f7942eb92715a1c8d610149714",
+                "sha256:3c5b42d0815e15518b1f0990cff7a705805961613e701db60387e6fb663fe78a",
+                "sha256:4365c60266b95a3f216a3047f1d8e3f895da6c7402e9e1ddfab96393122cc58d",
+                "sha256:50c7346a46dc76a4ed88f3277d4959de8a2bd0a0fa47fa87a4cde36fe247ac05",
+                "sha256:5b56154f8c09427bae082b32275a21f500b24d93c88d69a5e82f3978018a0266",
+                "sha256:74f7eccbfd436abe9c352ad9fb65872cc0f1f0a868e9d9c44db0893440f0c697",
+                "sha256:7b3f6f557ba4afc7f2ce6d3215d5db279bcf120b3cfd0add20a5d4f4abdae5bc",
+                "sha256:8c11003aaeaf7cc2d0f1bc101c1cc9454ec4cc9cb825aef3cafff8a5fdf4c799",
+                "sha256:8ca7f8c4b1584d63c9a0f827c37ba7a47226c19a23a753d52e5b5eddb201afcd",
+                "sha256:c89702cac5b302f0c5d33b172d2b55b5df2bede3344a2fbed99ff96bddb2cf00",
+                "sha256:d8f1ff62f7a879c9fe5917b3f9eb93a79b78aad47b533911b853a757223f72e7",
+                "sha256:d9d2b84b2007cea426e327d2483238f040c49405a6bf4074f605f0156c91a47a",
+                "sha256:e839191b8da5b4e5d805f940537efcaa13ea5dd98418f06dc585d2891d228cf0",
+                "sha256:f9fe20d0872b26c4bba1c1be02c5340de1019530302cf2dcc85c7f9fc3252ae0",
+                "sha256:ff3bf387c14c805ab1388185dd22d6b210824e164d4bb324b195ff34e322d166"
             ],
             "index": "pypi",
-            "version": "==0.910"
+            "version": "==0.931"
         },
         "mypy-extensions": {
             "hashes": [
@@ -427,6 +424,7 @@
                 "sha256:b5bde28da1fed24b9bd1d4d2b8cba62300bfb4ec9a6187a957e8ddb9434c5224",
                 "sha256:c292c34f58502a1eb2bbb9f5bbc9a5ebc37bee10ffb8c2d6bbdfa8eb13cc14e1"
             ],
+            "markers": "python_version >= '3.7'",
             "version": "==2.0.0"
         },
         "typed-ast": {