Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 5.3.2 to 5.6.3. - [Release notes](https://github.com/sebastianbergmann/phpunit/releases) - [Changelog](https://github.com/sebastianbergmann/phpunit/blob/master/ChangeLog-8.5.md) - [Commits](https://github.com/sebastianbergmann/phpunit/compare/5.3.2...5.6.3) --- updated-dependencies: - dependency-name: phpunit/phpunit dependency-type: direct:development ... Signed-off-by: dependabot[bot] <support@github.com>dependabot/composer/phpunit/phpunit-5.6.3