Update mock requirement from >=1.0.1 to >=5.2.0

Updates the requirements on [mock](https://github.com/testing-cabal/mock) to permit the latest version.
- [Changelog](https://github.com/testing-cabal/mock/blob/master/CHANGELOG.rst)
- [Commits](testing-cabal/mock@1.0.1...5.2.0)

---
updated-dependencies:
- dependency-name: mock
  dependency-version: 5.2.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements-test.txt

@@ -1,5 +1,5 @@
 -r requirements.txt
 coverage
 coveralls
-mock>=1.0.1
+mock>=5.2.0
 tox