Bugfix implicitly nullable parameter in AbstractBinaryInput::getRawBinary() (#674)

Co-authored-by: Henry Volkmer <[email protected]>

Author: HenryVolkmer

src/PageUtils/AbstractBinaryInput.php

@@ -63,7 +63,7 @@ public function getBase64(?int $timeout = null)
      *
      * @return string
      */
-    public function getRawBinary(int $timeout = null): string
+    public function getRawBinary(?int $timeout = null): string
     {
         return \base64_decode($this->getBase64($timeout), true);
     }