build(deps-dev): bump php-coveralls/php-coveralls from 2.2.0 to 2.3.0

Bumps [php-coveralls/php-coveralls](https://github.com/php-coveralls/php-coveralls) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/php-coveralls/php-coveralls/releases)
- [Changelog](https://github.com/php-coveralls/php-coveralls/blob/2.3/CHANGELOG.md)
- [Commits](php-coveralls/php-coveralls@v2.2.0...v2.3.0)

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

Author: dependabot-preview[bot]