[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 21.10b0 → 21.12b0](psf/black@21.10b0...21.12b0)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -6,7 +6,7 @@ repos:
       - id: end-of-file-fixer
       - id: trailing-whitespace
   - repo: https://github.com/psf/black
-    rev: 21.10b0
+    rev: 21.12b0
     hooks:
       - id: black
   - repo: https://github.com/PyCQA/flake8