Bump mock from 4.0.3 to 5.0.2

Bumps [mock](https://github.com/testing-cabal/mock) from 4.0.3 to 5.0.2.
- [Release notes](https://github.com/testing-cabal/mock/releases)
- [Changelog](https://github.com/testing-cabal/mock/blob/master/CHANGELOG.rst)
- [Commits](testing-cabal/mock@4.0.3...5.0.2)

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

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

Author: dependabot[bot]

poetry.lock

@@ -67,7 +67,7 @@ pytest = "^6.2.5"
 pytest-cov = "^4.0.0"
 pytest-timeout="^1.4.2"
 nbval="^0.9.6"
-mock="^4.0.2"
+mock=">=4.0.2,<6.0.0"
 mypy = "^0.982"
 twine = "^4.0.1"
 anonlink="^0.15"