Ajout du FR

Ajout du FR + correction du "functions.php"

vendor/react/promise/src/PromiseInterface.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace React\Promise;
+
+interface PromiseInterface
+{
+    /**
+     *
+     * The `$onProgress` argument is deprecated and should not be used anymore.
+     *
+     * @return PromiseInterface
+     */
+    public function then(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null);
+}