Updata guzzle version

Author: MBoretto

composer.json

@@ -22,7 +22,7 @@
         "ext-pdo": "*",
         "ext-curl": "*",
         "monolog/monolog": "^1.19",
-        "guzzlehttp/guzzle": "~6.0"
+        "guzzlehttp/guzzle": "^7.5"
     },
     "autoload": {
         "psr-4": {