Resolve "Remove all use of GLOBALS"

Closes #13

classes/modules/ServiceModule.php

@@ -198,7 +198,7 @@ final class ServiceModule implements ModuleInterface
         $params = $this->getParams($localUri);
         $extension = Utils::getExtension($acceptContentType, $conf['http_accept']);
         $args = array();
-        list($modelFile, $viewFile) = $service;
+        [$modelFile, $viewFile] = $service;
 
         try {
             $prefixHeader = array();