Fix deprecation in WrapTypesInAssertedTypes inspection

Author: drjayvee

src/Assertion/WrapTypesInAssertedTypes.php

@@ -31,7 +31,7 @@ public function leaveNode(Node $node, Environment $env): ?Node
         return $node;
     }
 
-    public function getPriority()
+    public function getPriority(): int
     {
         return 0;
     }