Mark support for slevomat/coding-standard ^8.0

[MasterOdin]

PR marks compatibility of this library with the ^8.0 line of slevomat/coding-standard. The big reason (for me) to do this is that the 8.0.1 release of slevomat/coding-standard had a fix to work with the latest versions of phpstan, for the following runtime error:

PHP Fatal error:  Uncaught TypeError: Argument 5 passed to SlevomatCodingStandard\Helpers\Annotation\ParameterAnnotation::__construct() must be an instance of PHPStan\PhpDocParser\Ast\PhpDoc\ParamTagValueNode or null, instance of PHPStan\PhpDocParser\Ast\PhpDoc\TypelessParamTagValueNode given, called in /home/runner/work/phinx/phinx/vendor/slevomat/coding-standard/SlevomatCodingStandard/Helpers/AnnotationHelper.php on line 357 and defined in /home/runner/work/phinx/phinx/vendor/slevomat/coding-standard/SlevomatCodingStandard/Helpers/Annotation/ParameterAnnotation.php:31
Stack trace:
#0 /home/runner/work/phinx/phinx/vendor/slevomat/coding-standard/SlevomatCodingStandard/Helpers/AnnotationHelper.php(357): SlevomatCodingStandard\Helpers\Annotation\ParameterAnnotation->__construct('@param', 74, 76, '$result', Object(PHPStan\PhpDocParser\Ast\PhpDoc\TypelessParamTagValueNode))
#1 /home/runner/work/phinx/phinx/vendor/slevomat/coding-standard/SlevomatCodingStandard/Helpers/SniffLocalCache.php(42): SlevomatCodingStandard\Helpers\Annota in /home/runner/work/phinx/phinx/vendor/slevomat/coding-standard/SlevomatCodingStandard/Helpers/Annotation/ParameterAnnotation.php on line 31

I checked and it does not look like this library makes use of any of the things that were removed in the 8.0.0 release.

[ADmad]

8.0 does has a breaking sniff rename which affects us, SlevomatCodingStandard.TypeHints.PropertyTypeHintSpacing was renamed to SlevomatCodingStandard.Classes.PropertyDeclaration.

[ADmad]

We can bump the minor version though and keep only 8.0+ as a dependency.

[MasterOdin]

I don't see SlevomatCodingStandard.TypeHints.PropertyTypeHintSpacing referenced in the ruleset.xml (I do see the similarly named SlevomatCodingStandard.TypeHints.ParameterTypeHintSpacing). Is it used as part of a custom ruleset outside of this library?

[ADmad]

My bad. We had used that sniff on the 5.x branch, it's not used for 4.x.

[othercorey]

I can do a release.