Update php-actions/phpunit action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
php-actions/phpunit	action	major	v3 -> v4

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Release Notes

php-actions/phpunit (php-actions/phpunit)

v4: .0.0

Compare Source

Important note about versioning

In this release, GitHub have changed to an auto-tagging model, where the release will be made as vX.Y.Z and an automatic tag is created called vX, so there will be no more proxy releases for the latest version number - just use v4 from now on!

What's Changed

• support --coverage-filter flag by @​shish in https://github.com/php-actions/phpunit/pull/60
• Use composer version of PHPUnit by default if availble by @​g105b in https://github.com/php-actions/phpunit/pull/61
• Revert phpbuild (docker user) by @​g105b in https://github.com/php-actions/phpunit/pull/63
• Remove the default value for the test_suffix parameter by @​cookieguru in https://github.com/php-actions/phpunit/pull/64

New Contributors

• @​shish made their first contribution in https://github.com/php-actions/phpunit/pull/60
• @​cookieguru made their first contribution in https://github.com/php-actions/phpunit/pull/64

Full Changelog: php-actions/phpunit@v3.0.3...v4

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