Java Feign template doesn't work with Feign 10

Created by: ihrankouski

Hello,

Currently Java Feign template generates code for Feign 9.4.0. I'd like the generated client to work with Feign 10.0.1 since I already use that version in my project. However that not possible currently because of breaking change in Feign:

#744 [Core] Added HttpMethod to RetryableException

https://github.com/OpenFeign/feign/pull/744/files#diff-64c69768b214213c25fd1246bae90adaR33 - RetryableException constructor wants HTTP method now.

Looks like it's only thrown here in this file: https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/resources/Java/libraries/feign/auth/OAuth.mustache#L95

So I had to overwrite original template with my own to generate working code right now.

But is it possible to update the template to support newer Feign out of box?