Update pre-commit requirement from ~=2.17 to ~=2.18 (#6177)

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@v2.17.0...v2.18.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Pierre Sassoulas <[email protected]>
Co-authored-by: Daniël van Noord <[email protected]>

Author: 3 people

requirements_test.txt

@@ -2,7 +2,7 @@
 -r requirements_test_min.txt
 coveralls~=3.3
 coverage~=6.3
-pre-commit~=2.17
+pre-commit~=2.18
 tbump~=6.7.0
 contributors-txt>=0.7.3
 pyenchant~=3.2