chore(deps-dev): Bump requests-mock from 1.10.0 to 1.12.1 (#252)

Bumps [requests-mock](https://github.com/jamielennox/requests-mock) from 1.10.0 to 1.12.1.
- [Release notes](https://github.com/jamielennox/requests-mock/releases)
- [Commits](jamielennox/requests-mock@1.10.0...1.12.1)

---
updated-dependencies:
- dependency-name: requests-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>