chore(deps-dev): update pre-commit requirement from ~=2.20 to ~=2.21 (#811)

Updates the requirements on [pre-commit](https://github.com/pre-commit/pre-commit) to permit the latest version.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/main/CHANGELOG.md)
- [Commits](pre-commit/pre-commit@v2.20.0...v2.21.0)

---
updated-dependencies:
- dependency-name: pre-commit
  dependency-type: direct:development
...

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Author: dependabot[bot]

Pipfile

@@ -9,7 +9,7 @@ httpretty = "~=1.1"
 isort = "~=5.11"
 mypy = "~=0.991"
 mock = "~=4.0"
-pre-commit = "~=2.20"
+pre-commit = "~=2.21"
 pylint = "~=2.15.9"
 pytest = "~=7.2"
 pytest-cov = "~=4.0"