Fix trailing comma

Author: jochensengier

composer.json

@@ -18,7 +18,7 @@
     ],
     "require": {
         "php": "^5.4 || ^7.0 || ^7.1 || ^7.2 || ^7.3 || ^7.4 || ^8.0 || ^8.1",
-        "guzzlehttp/guzzle": "^5.0 || ^6.0 || ^7.0",
+        "guzzlehttp/guzzle": "^5.0 || ^6.0 || ^7.0"
     },
     "autoload": {
         "psr-4": {