Removing Slevomat PHP 7.4+ only rule

Author: moufmouf

phpcs.xml.dist

@@ -24,6 +24,7 @@
         <exclude name="SlevomatCodingStandard.Classes.SuperfluousExceptionNaming.SuperfluousSuffix"/>
         <exclude name="SlevomatCodingStandard.Classes.SuperfluousTraitNaming.SuperfluousSuffix"/>
         <exclude name="SlevomatCodingStandard.Classes.SuperfluousAbstractClassNaming.SuperfluousPrefix"/>
+        <exclude name="SlevomatCodingStandard.ControlStructures.RequireNullCoalesceEqualOperator"/>
         <exclude name="Squiz.Commenting.FunctionComment.InvalidNoReturn" />
         <exclude name="Generic.Formatting.MultipleStatementAlignment" />
     </rule>

src/Annotations/ExtendType.php

@@ -36,7 +36,7 @@ class ExtendType
     public function __construct(array $attributes = [], ?string $class = null, ?string $name = null)
     {
         $className = isset($attributes['class']) ? ltrim($attributes['class'], '\\') : null;
-        $className ??= $class;
+        $className = $className ?? $class;
         if ($className !== null && ! class_exists($className) && ! interface_exists($className)) {
             throw ClassNotFoundException::couldNotFindClass($className);
         }