chore(deps): update precommit hook pycqa/isort to v5.9.0 (#247)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

.pre-commit-config.yaml

@@ -20,7 +20,7 @@ repos:
       - id: blacken-docs
         additional_dependencies: [black==20.8b1]
   - repo: https://github.com/PyCQA/isort
-    rev: 5.8.0
+    rev: 5.9.0
     hooks:
       - id: isort
   - repo: https://github.com/pre-commit/pygrep-hooks