Bump version to 4.12.0

CHANGELOG

@@ -1,3 +1,7 @@
+== Version 4.12.0
+
+* Added support for the GraphQL API
+
 == Version 4.11.0
 
 * Added `ShopifyAPI::InventoryItem`

lib/shopify_api/version.rb

@@ -1,3 +1,3 @@
 module ShopifyAPI
-  VERSION = "4.11.0"
+  VERSION = "4.12.0"
 end