Support PHP 8.2, drop support for PHP 8.0, upgrade to vimeo/psalm v5

[internalsystemerror]

This PR:

• Adds support for PHP 8.2
• Adds PHP 8.2 to the matrix for testing
• Drops support for PHP 8.0
• Updates the locked php version to 8.1
• Updates vimeo/psalm to v5
• Updates psalm/plugin-phpunit to v0.18

Closes:

• https://github.com/Roave/psr-container-doctrine/pull/87
• https://github.com/Roave/psr-container-doctrine/pull/88

[internalsystemerror]

These psalm errors don't show up locally, and I can fix all but 1, which gives an error locally OR on CI, but I can't solve for both:

https://github.com/Roave/psr-container-doctrine/actions/runs/3664302981/jobs/6194637843#step:6:28

When fixed for CI, locally I get a warning about an invalid suppresion.

[Ocramius]

Maybe that should just be a Memcached::class reference?

[internalsystemerror]

Done. I was trying to avoid importing memcached as that's why the suppression was originally there. But it only needs importing into the test it's used.

[internalsystemerror]

Oh, and memcached isn't actually installed in CI, so the builds will fail :/

[Ocramius]

Wait... PHP 8.1 now fails installation? D:

[internalsystemerror]

Yeah, I've noticed now that memcached was disabled in .github/workflows/test.yml waiting on a fix for https://github.com/php-memcached-dev/php-memcached/issues/477 ... Let me revert some stuff here and put back the original suppression ... It fails locally, but that might be my setup.

[internalsystemerror]

OK ... Try that, should be all green now.