build(deps-dev): Bump mutmut from 2.4.0 to 2.4.1

Bumps mutmut from 2.4.0 to 2.4.1.

Changelog

Sourced from mutmut's changelog.

2.4.1

* Support paths with path separators

Disable spinner in no-progress mode

Commits

• See full diff in compare view

Blocked by https://github.com/boxed/mutmut/issues/258.