Bump wp-cli/wp-cli-tests from 5.1.7 to 5.1.8

Bumps [wp-cli/wp-cli-tests](https://github.com/wp-cli/wp-cli-tests) from 5.1.7 to 5.1.8.
- [Release notes](https://github.com/wp-cli/wp-cli-tests/releases)
- [Commits](wp-cli/wp-cli-tests@v5.1.7...v5.1.8)

---
updated-dependencies:
- dependency-name: wp-cli/wp-cli-tests
  dependency-version: 5.1.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]