build(deps-dev): bump isort from 5.8.0 to 5.9.1

Bumps [isort](https://github.com/pycqa/isort) from 5.8.0 to 5.9.1.
- [Release notes](https://github.com/pycqa/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](https://github.com/pycqa/isort/compare/5.8.0...5.9.1)

---
updated-dependencies:
- dependency-name: isort
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Pipfile

@@ -21,7 +21,7 @@ black = "==21.5b1"
 coverage = "~=5.5"
 django-stubs = "~=1.8.0"
 flake8 = "~=3.9.2"
-isort = "~=5.8.0"
+isort = "~=5.9.1"
 mypy = "~=0.902"
 pylint = "~=2.8.3"
 pylint-django = "~=2.4.4"

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "fdc50ffaa88f4673780f5848091b4e5db7d1150da57df050aa6aa4fa9fa6070f"
+            "sha256": "07380a4e2c88915d8e295b40b517a4149cacde975e07374a586a0a5c71ea95e4"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -254,11 +254,11 @@
         },
         "prompt-toolkit": {
             "hashes": [
-                "sha256:bf00f22079f5fadc949f42ae8ff7f05702826a97059ffcc6281036ad40ac6f04",
+                "sha256:08360ee3a3148bdb5163621709ee322ec34fc4375099afa4bbf751e9b7b7fa4f",
-                "sha256:e1b4f11b9336a28fa11810bc623c357420f69dfdb6d2dac41ca2c21a55c033bc"
+                "sha256:7089d8d2938043508aa9420ec18ce0922885304cddae87fb96eebca942299f88"
             ],
             "markers": "python_full_version >= '3.6.1'",
-            "version": "==3.0.18"
+            "version": "==3.0.19"
         },
         "psycopg2": {
             "hashes": [
@@ -547,11 +547,11 @@
         },
         "isort": {
             "hashes": [
-                "sha256:0a943902919f65c5684ac4e0154b1ad4fac6dcaa5d9f3426b732f1c8b5419be6",
+                "sha256:83510593e07e433b77bd5bff0f6f607dbafa06d1a89022616f02d8b699cfcd56",
-                "sha256:2bb1680aad211e3c9944dbce1d4ba09a989f04e238296c87fe2139faa26d655d"
+                "sha256:8e2c107091cfec7286bc0f68a547d0ba4c094d460b732075b6fba674f1035c0c"
             ],
             "index": "pypi",
-            "version": "==5.8.0"
+            "version": "==5.9.1"
         },
         "lazy-object-proxy": {
             "hashes": [