Update pre-commit requirement from ~=2.19 to ~=2.20 (#70)

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@v2.19.0...v2.20.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements_dev.txt

@@ -1,3 +1,3 @@
 invoke~=1.7
-pre-commit~=2.19
+pre-commit~=2.20
 pylint~=2.14