2.7.0

What's new?

Remove AsyncRequestPerformer and RequestPerformer .perform() methods that take a URLRequest as argument, instead enforcing users to inject an object conforming to the Request protocol.

Reasoning for this is to enforce Protocol Oriented Design

Other changes:

• RequestBuilder.build() returns an instance of Request rather than URLRequest
• RequestFactory.build() returns an instance of Request rather than URLRequest
• rename Request.build() to Request.urlRequest()