chore(deps-dev): update pre-commit requirement from ~=2.13 to ~=2.15 (#634)

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/master/CHANGELOG.md)
- [Commits](pre-commit/pre-commit@v2.13.0...v2.15.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

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

Author: dependabot[bot]

Pipfile

@@ -4,7 +4,7 @@ url = "https://pypi.org/simple"
 verify_ssl = true
 
 [dev-packages]
-pre-commit = "~=2.13"
+pre-commit = "~=2.15"
 
 [packages]
 selenium = "~=3.141"