Bump wyrihaximus/test-utilities from 3.6.3 to 3.6.4
Bump wyrihaximus/test-utilities from 3.6.3 to 3.6.4

Bumps [wyrihaximus/test-utilities](https://github.com/WyriHaximus/php-test-utilities) from 3.6.3 to 3.6.4.
- [Release notes](https://github.com/WyriHaximus/php-test-utilities/releases)
- [Commits](https://github.com/WyriHaximus/php-test-utilities/compare/3.6.3...3.6.4)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
WyriHaximus/HtmlCompress,WyriHaximus/HtmlCompress