👷 Update php.yml

Bump phpunit/phpunit from 8.5.31 to 9.5.26 (#27)

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 8.5.31 to 9.5.26.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/main/ChangeLog-8.5.md)
- [Commits](sebastianbergmann/phpunit@8.5.31...9.5.26)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Update README.md

Fix LAYER FILTER

Add Composer PSR-4 autoload

Update Writer\Label.php

Apply fixes from StyleCI

Update Parser.php

Fix parsing of hexadecimal color.

Update Model\Layer.php

Update Writer\Web.php