Upgrade to openfeign 10.2.3

[spencergibb]

https://github.com/OpenFeign/feign/releases/tag/10.2.0

[spencergibb]

Minor needs to wair for Hoxton

[JBertaux]

feign-core in version 10.2.0 fixes a bug for the encoding of some characters like the '+'. Have you an idea of when you will upgrade ? Thanks

[ryanjbaxter]

It will be part of our Hoxton Release, for release dates please see https://github.com/spring-cloud/spring-cloud-release/milestones

[kdavisk6]

@spencergibb and @ryanjbaxter, we just release 10.2.3, with additional bug fixes reported by @OlgaMaciaszek. I recommend using that version.

https://github.com/OpenFeign/feign/releases/tag/10.2.3

[OlgaMaciaszek]

Yes @kdavisk6 , I am planning on upgrading it this week. It will fix #143

[OlgaMaciaszek]

Done in gh-185.