v0.1.1

- Updated the library for the new network interface of m3api v1.1.0, so
  that it can be used together with that version. (This also unlocks
  many new features in m3api-rest, which will be implemented in a
  subsequent release.)
- Introduced a new error type, `IncompatibleResponseType`, thrown if the
  server responds with an incompatible response type.
- Updated dependencies.