Merge pull request #16 from rvalitov/feature/guzzle7

[add] support for Guzzle7

Author: coderholic

composer.json

@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": "~7.0",
-        "guzzlehttp/guzzle": "^6.3",
+        "guzzlehttp/guzzle": "^6.3||^7.0",
         "sabre/cache": "^1.0",
         "ext-json": "*"
     },