Merge pull request #54 from esetnik/guzzle-7-support-1.0

add guzzle 7 to support list

Author: alek13

composer.json

@@ -15,7 +15,7 @@
     ],
     "require": {
         "php": "^5.6|^7.0",
-        "guzzlehttp/guzzle": "~6.0|~5.0|~4.0",
+        "guzzlehttp/guzzle": "~7.0|~6.0|~5.0|~4.0",
         "ext-mbstring": "*",
         "ext-json": "*"
     },