Bump mock from 5.0.1 to 5.1.0 (#740)

Bumps [mock](https://github.com/testing-cabal/mock) from 5.0.1 to 5.1.0.
- [Changelog](https://github.com/testing-cabal/mock/blob/master/CHANGELOG.rst)
- [Commits](testing-cabal/mock@5.0.1...5.1.0)

---
updated-dependencies:
- dependency-name: mock
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

requirements_dev.txt

@@ -1,5 +1,5 @@
 radish-bdd==0.13.1
-mock==5.0.1
+mock==5.1.0
 gitpython==3.1.20
 netaddr==0.8.0
 colorful==0.5.4