[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 21.11b1 → 21.12b0](psf/black@21.11b1...21.12b0)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -8,7 +8,7 @@ repos:
           - "-x *test*.py"
 
   - repo: https://github.com/psf/black
-    rev: 21.11b1
+    rev: 21.12b0
     hooks:
       - id: black
         language_version: python3.8