[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 21.11b1 → 21.12b0](psf/black@21.11b1...21.12b0)
- [github.com/pre-commit/mirrors-mypy: v0.910-1 → v0.920](pre-commit/mirrors-mypy@v0.910-1...v0.920)

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/psf/black
-    rev: 21.11b1
+    rev: 21.12b0
     hooks:
       - id: black
 
@@ -24,7 +24,7 @@ repos:
         additional_dependencies: [flake8-bugbear]
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.910-1
+    rev: v0.920
     hooks:
       - id: mypy