Use real type hints for class properties holding type hinted arguments

Provided arguments are already type-hinted on the construtor
and it is safe to use the same type on the class property

Change-Id: Ibb62443f02b4bf767c69d2f31709f9afe5afe1d2

Author: umherirrender

src/Entity/BasicEntityIdParser.php

@@ -12,7 +12,7 @@
  */
 class BasicEntityIdParser implements EntityIdParser {
 
-	private $idParser;
+	private DispatchingEntityIdParser $idParser;
 
 	public function __construct() {
 		$this->idParser = new DispatchingEntityIdParser( self::getBuilders() );

src/Entity/EntityIdValue.php

@@ -17,7 +17,7 @@
  */
 class EntityIdValue extends DataValueObject {
 
-	private $entityId;
+	private EntityId $entityId;
 
 	public function __construct( EntityId $entityId ) {
 		$this->entityId = $entityId;