refactor: ♻️ Update api call and version

Author: uttamukkoji

lib/contentstack/api.rb

@@ -3,9 +3,10 @@
 require 'active_support'
 require 'active_support/json'
 require 'open-uri'
-
+require 'util'
 module Contentstack
   class API
+    using Utility
     def self.init_api(api_key, delivery_token, environment,host)
       @host = host
       @api_version = '/v3'

lib/contentstack/version.rb

@@ -1,3 +1,3 @@
 module Contentstack
-  VERSION = "0.4.2"
+  VERSION = "0.4.3"
 end