Travis has recently introduced built limits which makes using them very
slow sometimes and I never really liked the setup for appveyor for our
Windows testing.
This makes use of github actions instead. Some notes:
* since we only support PHP 7.2+ anymore, nothing below is tested
* MySQL and Postgres auth backends are only tested on Linux (as before)
* I am not actually sure the problem matchers are working as intended
* There is currently no good way to run tests that are allowed to fail
so no PHP 8 tests are run yet
* I haven't reestablished the no-gzip test runs again, I'm not sure they
are still relevant on modern PHP systems
* PHP 7.4 currently fails because of https://github.com/MarcusSchwarz/lesserphp/pull/18
* I'm currently using @v2 tags for the used action. We had a discussion
before if we should actually pin the action to a fixed commit. For
sake of easier maintainance, I would argue to trust the setup-php
action.
Andreas Gohr