Update composer.json

Author: jszobody

composer.json

@@ -9,7 +9,7 @@
         "phpunit/phpunit": "^6.0",
         "mockery/mockery": "dev-master",
         "laravel/helpers": "^1.1",
-        "guzzlehttp/guzzle": "^6.1",
+        "guzzlehttp/guzzle": "^6.1"
     },
     "authors": [
         {