Version 0.15.0

• BREAKING: Finally swapped out URLSessionConfiguration on initializer for HTTPNetworkTransport to use URLSession directly instead. If you were previously passing in a configuration, first hand it to a URLSession instance and then pass that instance into the initializer.

  This allows many new things including:

  • Support for background sessions
  • Easier mocking through NSURLProtocol
  • Certificate pinning
  • Self-signed certificates
  • Metrics inspection
  • Authentication challenge handling

All these are pretty much entirely through the ability to use URLSessionDelegate directly since we're now accepting a URLSession you can declare yourself to be the delegate of rather than just the configuration. (#699, inspired by #265)

• BREAKING, though hopefully in a good way: Significant updates to the Upload functionality to make it conform more closely to the GraphQL Upload Spec. Also added a goodly bit of documentation around this functionality. (#707)
• Way better support for Swift Package Manager, especially for ApolloSQLite and ApolloWebSocket. (#674)
• Created ApolloClientProtocol to match all public methods of ApolloClient for easier mocking. (#715, inspired by #693)