* Fixed use of `rand()` without a parameter in math function (for v3.1)
Fixes#794
* Add change in regex for PRCE (PHP < 7.3)
* Add unit tests and correctly set PHP supported versions
* Drop PHP5.2 from CI workflows because it cannot be build anymore
* Fix CI workflow for PHP7.2 and up
* re-add compose packages cache with specific key
* Exclude unit test files from git export
* prevent double CI workflows in PRs
