Version 4.0
Upgrade slevomat/coding-standard
to v7.0
New rules:
SlevomatCodingStandard.TypeHints.UnionTypeHintFormat
SlevomatCodingStandard.Exceptions.RequireNonCapturingCatch
SlevomatCodingStandard.Functions.RequireTrailingCommaInDeclaration
Removed:
SlevomatCodingStandard.Classes.UnusedPrivateElements