Php8.1 is approaching EOL. Change our tools to run under 8.3 instead. I do not anticipate any difficulty for phpstan, php-cs-fixer, phpcs, phpdoc-types, versions, or coverage. PhpDocumetor needs to run with an updated phar, and I'm not sure whether it will be run until a release happens. No idea how Scrutinizer will handle the change; I'll just have to try it and see.
This is according to our formal, published, policy to only support
EOL PHP after 6 months.
See https://phpspreadsheet.readthedocs.io/en/latest/#php-version-support
Also share the exact same dev deps across all PHP version for GitHub
Actions so runs are faster, much most importantly they are stable and
predictable. And we decide manually when we want to migrate to PHPUnit
10.
Fixes#3634Closes#3710
oleibman
chris
Adrien Crivelli
Alex