fix: correct parent constructor call and static method usage in ExtendedWebServicesManager

- Pass null as first argument to parent::__construct() since
  WebServicesManager expects ?Request as first parameter, not string.

- Use $this->getRequest()->getMethod() instead of static
  Request::getMethod() which is not a static method.

Fixes #296

Author: Ibrahim BinAlshikh

WebFiori/Framework/ExtendedWebServicesManager.php

@@ -35,7 +35,7 @@ abstract class ExtendedWebServicesManager extends WebServicesManager {
      * @since 1.0
      */
     public function __construct(string $version = '1.0.0') {
-        parent::__construct($version);
+        parent::__construct(null, $version);
         $this->setTranslationHelper();
         $langCode = $this->getTranslation()->getCode();
         $generalDir = 'general';
@@ -216,7 +216,7 @@ public function setLangVars($dir,$arr = []) {
      * Set the language at which the API is going to use for the response.
      */
     private function setTranslationHelper() {
-        $reqMeth = Request::getMethod();
+        $reqMeth = $this->getRequest()->getMethod();
         $activeSession = SessionsManager::getActiveSession();
 
         if ($activeSession !== null) {