TBD

Fetching customer for checkout object is now deprecated and will always return null.
Add append Gift Card to the checkout
Return access token for new created customer
Add Fulfilment to the order object

Update sample store front schema

Update StoreFront schema
Remove Android Pay documentation
Update Apollo for sample app to the latest

Update schema
Downgrade lib min sdk to 19
Update sample app

Update schema version to the latest.
Update sample.

• make http cache versioned
• update StoreFront schema with the latest version
  • adds support for Swazi Lilangeni currency
  • adds an implementation sample for using discount codes for checkout
• fixes an issue where input objects sends null any way when it explicitly set

Updated store front schema:

• Adds ability to apply discounts to Storefront.Checkout via the checkoutDiscountCodeApply mutation
• Adds ability to explicitly set a customer's default address via the customerDefaultAddressUpdate mutation

Introduce Input wrapper for optional types to distinguish explicit null and undefined values.
Update store front schema to the latest

Update StoreFront schema