Fix psalm mixed param override

Signed-off-by: Abdul Malik Ikhsan <[email protected]>

src/FilterInterface.php

@@ -9,8 +9,9 @@ interface FilterInterface
     /**
      * Returns the result of filtering $value
      *
+     * @param  mixed $value
      * @throws Exception\RuntimeException If filtering $value is impossible.
      * @return mixed
      */
-    public function filter(mixed $value);
+    public function filter($value);
 }