update v1.0.7.9 R.C.

This is a Release Candidate. We are still testing.

vendor/guzzlehttp/guzzle/src/functions_include.php

@@ -0,0 +1,6 @@
+<?php
+
+// Don't redefine the functions if included multiple times.
+if (!function_exists('GuzzleHttp\uri_template')) {
+    require __DIR__ . '/functions.php';
+}