diff --git a/Pipfile b/Pipfile
index c9c7d5d..ee1967d 100644
--- a/Pipfile
+++ b/Pipfile
@@ -24,7 +24,7 @@ coverage = "~=6.3.2"
 django-stubs = "~=1.9.0"
 flake8 = "~=4.0.1"
 isort = "~=5.10.1"
-mypy = "~=0.942"
+mypy = "~=0.950"
 pylint = "~=2.13.7"
 pylint-django = "~=2.5.3"
 pyyaml = "~=6.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index 5399555..22e1fc8 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "9142d7968758585d90dc09ea182bc61287f7a0d5d6544ce7620f02b3c9216f21"
+            "sha256": "c4388bb1af3d2963fa4a7e9d2a7766793e222318bb4102f92b57c0bfc7eb4001"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -118,29 +118,31 @@
         },
         "cryptography": {
             "hashes": [
-                "sha256:0a3bf09bb0b7a2c93ce7b98cb107e9170a90c51a0162a20af1c61c765b90e60b",
-                "sha256:1f64a62b3b75e4005df19d3b5235abd43fa6358d5516cfc43d87aeba8d08dd51",
-                "sha256:32db5cc49c73f39aac27574522cecd0a4bb7384e71198bc65a0d23f901e89bb7",
-                "sha256:4881d09298cd0b669bb15b9cfe6166f16fc1277b4ed0d04a22f3d6430cb30f1d",
-                "sha256:4e2dddd38a5ba733be6a025a1475a9f45e4e41139d1321f412c6b360b19070b6",
-                "sha256:53e0285b49fd0ab6e604f4c5d9c5ddd98de77018542e88366923f152dbeb3c29",
-                "sha256:70f8f4f7bb2ac9f340655cbac89d68c527af5bb4387522a8413e841e3e6628c9",
-                "sha256:7b2d54e787a884ffc6e187262823b6feb06c338084bbe80d45166a1cb1c6c5bf",
-                "sha256:7be666cc4599b415f320839e36367b273db8501127b38316f3b9f22f17a0b815",
-                "sha256:8241cac0aae90b82d6b5c443b853723bcc66963970c67e56e71a2609dc4b5eaf",
-                "sha256:82740818f2f240a5da8dfb8943b360e4f24022b093207160c77cadade47d7c85",
-                "sha256:8897b7b7ec077c819187a123174b645eb680c13df68354ed99f9b40a50898f77",
-                "sha256:c2c5250ff0d36fd58550252f54915776940e4e866f38f3a7866d92b32a654b86",
-                "sha256:ca9f686517ec2c4a4ce930207f75c00bf03d94e5063cbc00a1dc42531511b7eb",
-                "sha256:d2b3d199647468d410994dbeb8cec5816fb74feb9368aedf300af709ef507e3e",
-                "sha256:da73d095f8590ad437cd5e9faf6628a218aa7c387e1fdf67b888b47ba56a17f0",
-                "sha256:e167b6b710c7f7bc54e67ef593f8731e1f45aa35f8a8a7b72d6e42ec76afd4b3",
-                "sha256:ea634401ca02367c1567f012317502ef3437522e2fc44a3ea1844de028fa4b84",
-                "sha256:ec6597aa85ce03f3e507566b8bcdf9da2227ec86c4266bd5e6ab4d9e0cc8dab2",
-                "sha256:f64b232348ee82f13aac22856515ce0195837f6968aeaa94a3d0353ea2ec06a6"
+                "sha256:06bfafa6e53ccbfb7a94be4687b211a025ce0625e3f3c60bb15cd048a18f3ed8",
+                "sha256:0db5cf21bd7d092baacb576482b0245102cea2d3cf09f09271ce9f69624ecb6f",
+                "sha256:125702572be12bcd318e3a14e9e70acd4be69a43664a75f0397e8650fe3c6cc3",
+                "sha256:1858eff6246bb8bbc080eee78f3dd1528739e3f416cba5f9914e8631b8df9871",
+                "sha256:315af6268de72bcfa0bb3401350ce7d921f216e6b60de12a363dad128d9d459f",
+                "sha256:451aaff8b8adf2dd0597cbb1fdcfc8a7d580f33f843b7cce75307a7f20112dd8",
+                "sha256:58021d6e9b1d88b1105269d0da5e60e778b37dfc0e824efc71343dd003726831",
+                "sha256:618391152147a1221c87b1b0b7f792cafcfd4b5a685c5c72eeea2ddd29aeceff",
+                "sha256:6d4daf890e674d191757d8d7d60dc3a29c58c72c7a76a05f1c0a326013f47e8b",
+                "sha256:74b55f67f4cf026cb84da7a1b04fc2a1d260193d4ad0ea5e9897c8b74c1e76ac",
+                "sha256:7ceae26f876aabe193b13a0c36d1bb8e3e7e608d17351861b437bd882f617e9f",
+                "sha256:930b829e8a2abaf43a19f38277ae3c5e1ffcf547b936a927d2587769ae52c296",
+                "sha256:a18ff4bfa9d64914a84d7b06c46eb86e0cc03113470b3c111255aceb6dcaf81d",
+                "sha256:ae1cd29fbe6b716855454e44f4bf743465152e15d2d317303fe3b58ee9e5af7a",
+                "sha256:b1ee5c82cf03b30f6ae4e32d2bcb1e167ef74d6071cbb77c2af30f101d0b360b",
+                "sha256:bf585476fcbcd37bed08072e8e2db3954ce1bfc68087a2dc9c19cfe0b90979ca",
+                "sha256:c4a58eeafbd7409054be41a377e726a7904a17c26f45abf18125d21b1215b08b",
+                "sha256:cce90609e01e1b192fae9e13665058ab46b2ea53a3c05a3ea74a3eb8c3af8857",
+                "sha256:d610d0ee14dd9109006215c7c0de15eee91230b70a9bce2263461cf7c3720b83",
+                "sha256:e69a0e36e62279120e648e787b76d79b41e0f9e86c1c636a4f38d415595c722e",
+                "sha256:f095988548ec5095e3750cdb30e6962273d239b1998ba1aac66c0d5bee7111c1",
+                "sha256:faf0f5456c059c7b1c29441bdd5e988f0ba75bdc3eea776520d8dcb1e30e1b5c"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==36.0.2"
+            "version": "==37.0.1"
         },
         "decorator": {
             "hashes": [
@@ -656,32 +658,32 @@
         },
         "mypy": {
             "hashes": [
-                "sha256:0e2dd88410937423fba18e57147dd07cd8381291b93d5b1984626f173a26543e",
-                "sha256:10daab80bc40f84e3f087d896cdb53dc811a9f04eae4b3f95779c26edee89d16",
-                "sha256:17e44649fec92e9f82102b48a3bf7b4a5510ad0cd22fa21a104826b5db4903e2",
-                "sha256:1a0459c333f00e6a11cbf6b468b870c2b99a906cb72d6eadf3d1d95d38c9352c",
-                "sha256:246e1aa127d5b78488a4a0594bd95f6d6fb9d63cf08a66dafbff8595d8891f67",
-                "sha256:2b184db8c618c43c3a31b32ff00cd28195d39e9c24e7c3b401f3db7f6e5767f5",
-                "sha256:2bc249409a7168d37c658e062e1ab5173300984a2dada2589638568ddc1db02b",
-                "sha256:3841b5433ff936bff2f4dc8d54cf2cdbfea5d8e88cedfac45c161368e5770ba6",
-                "sha256:4c3e497588afccfa4334a9986b56f703e75793133c4be3a02d06a3df16b67a58",
-                "sha256:5bf44840fb43ac4074636fd47ee476d73f0039f4f54e86d7265077dc199be24d",
-                "sha256:64235137edc16bee6f095aba73be5334677d6f6bdb7fa03cfab90164fa294a17",
-                "sha256:6776e5fa22381cc761df53e7496a805801c1a751b27b99a9ff2f0ca848c7eca0",
-                "sha256:6ce34a118d1a898f47def970a2042b8af6bdcc01546454726c7dd2171aa6dfca",
-                "sha256:6f6ad963172152e112b87cc7ec103ba0f2db2f1cd8997237827c052a3903eaa6",
-                "sha256:6f7106cbf9cc2f403693bf50ed7c9fa5bb3dfa9007b240db3c910929abe2a322",
-                "sha256:7742d2c4e46bb5017b51c810283a6a389296cda03df805a4f7869a6f41246534",
-                "sha256:9521c1265ccaaa1791d2c13582f06facf815f426cd8b07c3a485f486a8ffc1f3",
-                "sha256:a1b383fe99678d7402754fe90448d4037f9512ce70c21f8aee3b8bf48ffc51db",
-                "sha256:b840cfe89c4ab6386c40300689cd8645fc8d2d5f20101c7f8bd23d15fca14904",
-                "sha256:d8d3ba77e56b84cd47a8ee45b62c84b6d80d32383928fe2548c9a124ea0a725c",
-                "sha256:dcd955f36e0180258a96f880348fbca54ce092b40fbb4b37372ae3b25a0b0a46",
-                "sha256:e865fec858d75b78b4d63266c9aff770ecb6a39dfb6d6b56c47f7f8aba6baba8",
-                "sha256:edf7237137a1a9330046dbb14796963d734dd740a98d5e144a3eb1d267f5f9ee"
+                "sha256:0112752a6ff07230f9ec2f71b0d3d4e088a910fdce454fdb6553e83ed0eced7d",
+                "sha256:0384d9f3af49837baa92f559d3fa673e6d2652a16550a9ee07fc08c736f5e6f8",
+                "sha256:1b333cfbca1762ff15808a0ef4f71b5d3eed8528b23ea1c3fb50543c867d68de",
+                "sha256:1fdeb0a0f64f2a874a4c1f5271f06e40e1e9779bf55f9567f149466fc7a55038",
+                "sha256:4c653e4846f287051599ed8f4b3c044b80e540e88feec76b11044ddc5612ffed",
+                "sha256:563514c7dc504698fb66bb1cf897657a173a496406f1866afae73ab5b3cdb334",
+                "sha256:5b231afd6a6e951381b9ef09a1223b1feabe13625388db48a8690f8daa9b71ff",
+                "sha256:5ce6a09042b6da16d773d2110e44f169683d8cc8687e79ec6d1181a72cb028d2",
+                "sha256:5e7647df0f8fc947388e6251d728189cfadb3b1e558407f93254e35abc026e22",
+                "sha256:6003de687c13196e8a1243a5e4bcce617d79b88f83ee6625437e335d89dfebe2",
+                "sha256:61504b9a5ae166ba5ecfed9e93357fd51aa693d3d434b582a925338a2ff57fd2",
+                "sha256:77423570c04aca807508a492037abbd72b12a1fb25a385847d191cd50b2c9605",
+                "sha256:a4d9898f46446bfb6405383b57b96737dcfd0a7f25b748e78ef3e8c576bba3cb",
+                "sha256:a952b8bc0ae278fc6316e6384f67bb9a396eb30aced6ad034d3a76120ebcc519",
+                "sha256:b5b5bd0ffb11b4aba2bb6d31b8643902c48f990cc92fda4e21afac658044f0c0",
+                "sha256:ca75ecf2783395ca3016a5e455cb322ba26b6d33b4b413fcdedfc632e67941dc",
+                "sha256:cf9c261958a769a3bd38c3e133801ebcd284ffb734ea12d01457cb09eacf7d7b",
+                "sha256:dd4d670eee9610bf61c25c940e9ade2d0ed05eb44227275cce88701fee014b1f",
+                "sha256:e19736af56947addedce4674c0971e5dceef1b5ec7d667fe86bcd2b07f8f9075",
+                "sha256:eaea21d150fb26d7b4856766e7addcf929119dd19fc832b22e71d942835201ef",
+                "sha256:eaff8156016487c1af5ffa5304c3e3fd183edcb412f3e9c72db349faf3f6e0eb",
+                "sha256:ee0a36edd332ed2c5208565ae6e3a7afc0eabb53f5327e281f2ef03a6bc7687a",
+                "sha256:ef7beb2a3582eb7a9f37beaf38a28acfd801988cde688760aea9e6cc4832b10b"
             ],
             "index": "pypi",
-            "version": "==0.942"
+            "version": "==0.950"
         },
         "mypy-extensions": {
             "hashes": [
@@ -864,10 +866,10 @@
         },
         "types-pytz": {
             "hashes": [
-                "sha256:6805c72d51118923c5bf98633c39593d5b464d2ab49a803440e2d7ab6b8920df",
-                "sha256:74547fd90d8d8ab4f1eedf3a344a7d186d97486973895f81221a712e1e2cd993"
+                "sha256:0f67528c1df2017b61a45f2f9cfa2d45b16ce1dc135f09c7d2fd258998aade58",
+                "sha256:11d5ba06268167953ccc4a3eee192c24b42d00d2aef456c160a8798893cb2081"
             ],
-            "version": "==2021.3.6"
+            "version": "==2021.3.7"
         },
         "types-pyyaml": {
             "hashes": [