Changelog: `void` arrow functions should allow any rhs type

[eernstg]

This is the changelog issue for #28939.

[whesse]

Is this issue finished now? Can it be closed?

[eernstg]

Sorry, I forgot: it's landed as 9820535 on 2017-05-18. Closing.

[zoechi]

Does this mean that using => is now fine for setters?

[floitschG]

Yes. It will be.
I believe we haven't yet changed the analyzer's check, though.

[eernstg]

The analyzer handles this from 6cb0966, 2017-05-11, and that seems to be included in 1.24.0-dev.5.0. There was one omission (setters), but that was in fact already covered by the implementation in the analyzer (and in dart2js), so the only thing we're doing for that is adding a few tests (so it shouldn't affect you that they haven't been landed yet).