Added two missing ini settings to the list as per reactphp#271 (comment)

WyriHaximus · WyriHaximus · commit 856ed57d9816 · 2017-12-10T15:21:55.000+01:00
diff --git a/src/Server.php b/src/Server.php
@@ -25,6 +25,8 @@
  * - post_max_size
  * - max_input_nesting_level
  * - max_input_vars
+ * - file_uploads
+ * - max_file_uploads
  */
 final class Server
 {
