Use $_REQUEST instead of $_GET for the file name param getters.

Thanks @vvinhas for the comment:
blueimp@f44f773c9c3e400b420
c8a5de7760bf3b4d652ce#commitcomment-6606586

server/php/UploadHandler.php

@@ -1,6 +1,6 @@
 <?php
 /*
- * jQuery File Upload Plugin PHP Class 8.0.0
+ * jQuery File Upload Plugin PHP Class 8.0.1
  * https://github.com/blueimp/jQuery-File-Upload
  *
  * Copyright 2010, Sebastian Tschan
@@ -1133,12 +1133,12 @@ protected function get_singular_param_name() {
 
     protected function get_file_name_param() {
         $name = $this->get_singular_param_name();
-        return isset($_GET[$name]) ? basename(stripslashes($_GET[$name])) : null;
+        return isset($_REQUEST[$name]) ? basename(stripslashes($_REQUEST[$name])) : null;
     }
 
     protected function get_file_names_params() {
-        $params = isset($_GET[$this->options['param_name']]) ?
-            $_GET[$this->options['param_name']] : array();
+        $params = isset($_REQUEST[$this->options['param_name']]) ?
+            $_REQUEST[$this->options['param_name']] : array();
         foreach ($params as $key => $value) {
             $params[$key] = basename(stripslashes($value));
         }