Bump to version 4.3.1

CHANGELOG

@@ -1,3 +1,7 @@
+== Version 4.3.1
+
+* Support for ShopifyAPI::ApplicationCredit
+
 == Version 4.3.0
 
 * Require Ruby >= `2.3.0`

lib/shopify_api/version.rb

@@ -1,3 +1,3 @@
 module ShopifyAPI
-  VERSION = "4.3.0"
+  VERSION = "4.3.1"
 end