Merge pull request #23 from cleentfaar/lowered-dependencies

Lowered version for json-schema

Author: aliabbasrizvi

composer.json

@@ -11,7 +11,7 @@
   ],
   "require": {
     "php": ">=5.5",
-    "justinrainbow/json-schema": "4.0.0",
+    "justinrainbow/json-schema": "^1.6 || ^2.0 || ^4.0",
     "lastguest/murmurhash": "1.3.0",
     "guzzlehttp/guzzle": "~5.3|~6.2",
     "monolog/monolog": "1.21.0"