multiple guzzle verisons added

Author: laxman

composer.json

@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": ">=5.6",
-        "guzzlehttp/guzzle": "^7.0"
+        "guzzlehttp/guzzle": "^5.*|^6.*|^7.*"
     },
     "require-dev": {
         "mockery/mockery": "^0.9.5",