Merge pull request #57 from PhilETaylor/patch-1

Private methods cannot be final as they are never overridden by other classes

src/Util.php

@@ -370,7 +370,7 @@ public static function stringToFloat($string)
     /**
      * @return bool|null
      */
-    private static final function getWrongEndianness()
+    private static function getWrongEndianness()
     {
         $x = \pack('d', 1.618);
         if ($x === "\x17\xd9\xce\xf7\x53\xe3\xf9\x3f") {