[pre-commit.ci] pre-commit autoupdate (#667)

updates:
- [github.com/psf/black: 21.6b0 → 21.7b0](psf/black@21.6b0...21.7b0)
- [github.com/PyCQA/isort: 5.8.0 → 5.9.2](PyCQA/isort@5.8.0...5.9.2)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/psf/black
-    rev: 21.6b0
+    rev: 21.7b0
     hooks:
       - id: black
         args: ["--target-version=py36"]
@@ -18,7 +18,7 @@ repos:
         language_version: python3.8
 
   - repo: https://github.com/PyCQA/isort
-    rev: 5.8.0
+    rev: 5.9.2
     hooks:
       - id: isort