Merge pull request #12 from munvier/master

New way of testing the method of the request

src/Routing/Middleware/CorsMiddleware.php

@@ -18,7 +18,7 @@ public function __invoke(ServerRequestInterface $request, ResponseInterface $res
                 ->withHeader('Access-Control-Allow-Credentials', $this->_allowCredentials())
                 ->withHeader('Access-Control-Max-Age', $this->_maxAge());
 
-            if ($request->is('options')) {
+            if (strtoupper($request->getMethod()) === 'OPTIONS') {
                 $response = $response
                     ->withHeader('Access-Control-Allow-Headers', $this->_allowHeaders($request))
                     ->withHeader('Access-Control-Allow-Methods', $this->_allowMethods())