type hinting javascriptController (#5032)

app/Controllers/javascriptController.php

@@ -1,11 +1,11 @@
 <?php
 
 class FreshRSS_javascript_Controller extends FreshRSS_ActionController {
-	public function firstAction() {
+	public function firstAction(): void {
 		$this->view->_layout(false);
 	}
 
-	public function actualizeAction() {
+	public function actualizeAction(): void {
 		header('Content-Type: application/json; charset=UTF-8');
 		Minz_Session::_param('actualize_feeds', false);
 
@@ -16,7 +16,7 @@ class FreshRSS_javascript_Controller extends FreshRSS_ActionController {
 		$this->view->feeds = $feedDAO->listFeedsOrderUpdate(FreshRSS_Context::$user_conf->ttl_default);
 	}
 
-	public function nbUnreadsPerFeedAction() {
+	public function nbUnreadsPerFeedAction(): void {
 		header('Content-Type: application/json; charset=UTF-8');
 		$catDAO = FreshRSS_Factory::createCategoryDao();
 		$this->view->categories = $catDAO->listCategories(true, false);
@@ -25,7 +25,7 @@ class FreshRSS_javascript_Controller extends FreshRSS_ActionController {
 	}
 
 	//For Web-form login
-	public function nonceAction() {
+	public function nonceAction(): void {
 		header('Content-Type: application/json; charset=UTF-8');
 		header('Last-Modified: ' . gmdate('D, d M Y H:i:s \G\M\T'));
 		header('Expires: 0');