Merge pull request #702 from AntonStoeckl/param-fetcher-regex-utf8

Update ParamFetcher to handle UTF8 requirements

Author: lsmith77

Request/ParamFetcher.php

@@ -161,7 +161,7 @@ public function cleanParamWithRequirements(Param $config, $param, $strict)
 
         if ('' !== $config->requirements
             && ($param !== $default || null === $default)
-            && !preg_match('#^'.$config->requirements.'$#xs', $param)
+            && !preg_match('#^'.$config->requirements.'$#xsu', $param)
         ) {
             if ($strict) {
                 $paramType = $config instanceof QueryParam ? 'Query' : 'Request';