0.2.0

CHANGES:

• API: In the body function passed to request, the response is the first
  argument. This allows a client to do different stuff with the body, depending
  on the response code (and/or content type etc.) (#15 by @hannesm, reviewed and
  suggested by @reynir in https://git.robur.io/robur/http-mirage-client/pulls/2)