Bump wp-coding-standards/wpcs from 2.3.0 to 3.1.0

Bumps [wp-coding-standards/wpcs](https://github.com/WordPress/WordPress-Coding-Standards) from 2.3.0 to 3.1.0.
- [Release notes](https://github.com/WordPress/WordPress-Coding-Standards/releases)
- [Changelog](https://github.com/WordPress/WordPress-Coding-Standards/blob/develop/CHANGELOG.md)
- [Commits](WordPress/WordPress-Coding-Standards@2.3.0...3.1.0)

---
updated-dependencies:
- dependency-name: wp-coding-standards/wpcs
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]