Support JDK9+ HttpClient

[kdavisk6]

The Default Client implementation uses HttpUrlConnection to make requests. For users on older JDK (JDK 8 and prior), this is still a good option. However, users of JDK9+ have access to the new HttpClient API. Please consider adding support for the new HttpClient API.

[cantaylancapraz]

Any update?

[velo]

Yes, fixed a long while back
https://github.com/OpenFeign/feign/tree/master/java11

[janezmejias009]

Hi guys, PATCH is not supported?