vimeo/psalm 4.0.0-beta1 on PHP Packagist

This release supports PHP 8 and its new features.

It bumps the minimum requirement to PHP 7.3.

It includes better unused variable detection.

It includes these breaking changes for v4:

User-facing

remove issues MisplacedRequiredParam, TypeCoercion, MixedTypeCoercion
remove support for @template-typeof
default to not disabling checks with UnresolvableInclude (#2818)
Remove requireVoidReturnType, useAssertForType config flags, both now permanently true
Change default on resolveFromConfigFile to "true". This means if your Psalm config is not in the same directory that you run Psalm from, and you want to keep all the paths correct, you'll need to add resolveFromConfigFile="false" to maintain existing path resolution

class constants should live in their own storage object
rename TFn to TClosure, ObjectLike to TKeyedArray, GetClassT to TDependentGetClass, GetTypeT to TDependentGetType
Remove return type manipulation from AfterFunctionCallAnalysisInterface – use the MethodReturnTypeProviderInterface and FunctionReturnTypeProviderInterface hooks instead
Added return and param types to plugin hooks