[pre-commit.ci] pre-commit autoupdate (#20)

updates:
- [github.com/psf/black: 21.9b0 → 21.11b1](psf/black@21.9b0...21.11b1)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

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: 21.9b0
+    rev: 21.11b1
     hooks:
     -   id: black
 -   repo: https://github.com/kynan/nbstripout