[pre-commit.ci] pre-commit autoupdate (#656)

updates:
- [github.com/psf/black: 21.4b1 → 21.4b2](https://github.com/psf/black/compare/21.4b1...21.4b2)
- [github.com/asottile/pyupgrade: v2.13.0 → v2.14.0](https://github.com/asottile/pyupgrade/compare/v2.13.0...v2.14.0)

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

.pre-commit-config.yaml

@@ -43,7 +43,7 @@ repos:
     args: ["--python-version=3.7", "--ignore-missing-imports", "--scripts-are-modules"]
 
 - repo: https://github.com/asottile/pyupgrade
-  rev: v2.13.0
+  rev: v2.14.0
   hooks:
   - id: pyupgrade
     name: PyUpgrade 3.6+