[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 21.6b0 → 21.7b0](psf/black@21.6b0...21.7b0)
- [github.com/asottile/pyupgrade: v2.21.0 → v2.23.0](asottile/pyupgrade@v2.21.0...v2.23.0)

.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]
@@ -9,7 +9,7 @@ repos:
     hooks:
       - id: isort
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.21.0
+    rev: v2.23.0
     hooks:
       - id: pyupgrade
         args: [--py36-plus]