Run tests against PHP 7.3+ and check for cross-version support for PHP 5.4+

[swissspidy]

No description provided.

[jdpedrie]

Thanks @swissspidy, the proposal makes a lot of sense! We'll need to address the failing tests, but once that gets ironed out I'm good with this.

[swissspidy]

Thanks @jdpedrie! Not sure why the tests fail on PHP 5.4 though 🤔
I suppose it's because of different versions of packages being used. Any hint appreciated.

[swissspidy]

Working smoothly now! 🎉

[swissspidy]

BTW I also might have a small change ready that could help with the PHP 7.4 failures. Basically, it would run tests on that platform using a newer version of PHPUnit.

[jdpedrie]

Looks good to me. Will 7.4snapshot still be available once 7.4 is officially released?

[swissspidy]

In my experience the snapshot builds on Travis would then just be for the 7.4.x alphas. Because for PHP 8 there is the nightly version.

[jdpedrie]

So once we get to release, we'll need to be sure to update this to 7.4.

[swissspidy]

Ideally, yes :-)