[FEATURE] Add support for PHP 8.6

[oliverklee]

No description provided.

[coveralls]

coverage: 75.873%. remained the same — feature/php-86 into main

[oliverklee]

This probably requires the PHPStan update in #1610.

[JakeQZ]

This probably requires the PHPStan update in #1610.

That's now resolved.

Seems we're both trying to rebase this at the same time. Hope I haven't trampled on your branch.

The unit tests are still failing with PHP 8.6...

[JakeQZ]

The unit tests are still failing with PHP 8.6...

The error is from https://github.com/enojaroff/HOA-Consistency/blob/master/Source/Prelude.php#L54, in a dependency of PHPStan that appears to be no longer maintained.

I don't know how soon it is likely to be fixed and then make its way into PHPStan, if ever. I've logged phpstan/phpstan#15127.

If we want to move forward with PHP 8.6 sooner, we could temporarily put a try...catch block in the test. Though I don't know what it should be catching, and don't have any plans to install PHP 8.6 locally to find out. The test would still run as intended on PHP<=8.5.

[JakeQZ]

#1627 should help, following review, and then rebase of this.