Merge pull request #64 from guillaume-ro-fr/master

Allow Guzzle 7

Author: Jamesking56

composer.json

@@ -10,7 +10,7 @@
     ],
     "require": {
         "php": ">=7.0",
-        "guzzlehttp/guzzle": "^6.0",
+        "guzzlehttp/guzzle": "^6.0 || ^7.0",
         "codeception/codeception": "^2.2 || ^3.0 || ^4.0",
         "zbateson/mail-mime-parser": "^1.2"
     },