Added PHP 8.3 support

[grossmannmartin]

• Increased version of infection tool to avoid errors
• dependencies in a dev build are now installed with --ignore-platform-reqs because dev dependency zalas/phpunit-globals requires PhpUnit 10 in a version that supports PHP 8.3.
• tests are passing with min deps and high deps (at least locally)
• increased minimum version of dev dependency zalas/phpunit-doubles, so the minimal deps install passes tests

[jakzal]

Thanks for working on this!

dependencies in a dev build are now installed with --ignore-platform-reqs because dev dependency zalas/phpunit-globals requires PhpUnit 10 in a version that supports PHP 8.3.

I'm afraid this isn't acceptable. We need to think of another solution. Perhaps bringing PHP 8.3 support to the 2.6 version of phpunit-globals would work?

Builds for PHP 8.1 are failing. Support for PHP 8.1 can be dropped if its causing problems.

[grossmannmartin]

@jakzal Thank you for your feedback.

That makes sense, I have created the PR in the 2.6 branch zalas/phpunit-globals, so it seems like it should work after

[jakzal]

Thank you @grossmannmartin 🍺