Composer require 'ext-json' package

Author: Marko Dobric

composer.json

@@ -6,7 +6,8 @@
         "php": ">=7.1",
         "quickbooks/v3-php-sdk": "^5.0",
         "league/oauth1-client": "1.6.*",
-        "guzzle/guzzle": "3.8.*"
+        "guzzle/guzzle": "3.8.*",
+        "ext-json": "^1.5"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.0"