Create php.yml workflow actions

Parameters as values of associative array.

Parameters as values of associative array.

Fix issue with 7.0 when return type void

Fix classname issue edno#13

Merge pull request edno#11 from edno/dependabot/composer/satooshi/php…

…-coveralls-tw-2.0

Update satooshi/php-coveralls requirement from ^1.0 to ^2.0

Update badges (readme.md)

Change all static:: to self::

README.md (shields)

Fix ... ooops

Fix composer dev dependencies issue (edno#4)