build(deps-dev): bump black and flake8

Pipfile

@@ -17,10 +17,10 @@ whitenoise = "~=5.2.0"
 
 [dev-packages]
 autopep8 = "~=1.5.7"
-black = "==21.5b0"
+black = "==21.5b1"
 coverage = "~=5.5"
 django-stubs = "~=1.8.0"
-flake8 = "~=3.9.1"
+flake8 = "~=3.9.2"
 isort = "~=5.8.0"
 mypy = "~=0.812"
 pylint = "~=2.8.2"

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "adb0bccd15c5e346422e527df42dde060334ca8740c53e6c768e73a64355dd94"
+            "sha256": "ce1ab7b326307e34491cf1c3ddb3dffa253178d9630c34c16f5b46d8eac9399e"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -429,11 +429,11 @@
         },
         "black": {
             "hashes": [
-                "sha256:0e80435b8a88f383c9149ae89d671eb2095b72344b0fe8a1d61d2ff5110ed173",
-                "sha256:9dc2042018ca10735366d944c2c12d9cad6dec74a3d5f679d09384ea185d9943"
+                "sha256:23695358dbcb3deafe7f0a3ad89feee5999a46be5fec21f4f1d108be0bcdb3b1",
+                "sha256:8a60071a0043876a4ae96e6c69bd3a127dad2c1ca7c8083573eb82f92705d008"
             ],
             "index": "pypi",
-            "version": "==21.5b0"
+            "version": "==21.5b1"
         },
         "click": {
             "hashes": [
@@ -527,11 +527,11 @@
         },
         "flake8": {
             "hashes": [
-                "sha256:1aa8990be1e689d96c745c5682b687ea49f2e05a443aff1f8251092b0014e378",
-                "sha256:3b9f848952dddccf635be78098ca75010f073bfe14d2c6bda867154bea728d2a"
+                "sha256:07528381786f2a6237b061f6e96610a4167b226cb926e2aa2b6b1d78057c576b",
+                "sha256:bf8fd333346d844f616e8d47905ef3a3384edae6b4e9beb0c5101e25e3110907"
             ],
             "index": "pypi",
-            "version": "==3.9.1"
+            "version": "==3.9.2"
         },
         "isort": {
             "hashes": [