[pre-commit.ci] pre-commit autoupdate (#716)

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

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: 21.11b1
+    rev: 21.12b0
     hooks:
       - id: black
         args: ["--target-version=py36"]