can I replace the log package with zap?

[wuzhican]

I use the zap to take over the gin logger and other package's log.it'sI use zap to take over the log output of the package in the project, and I also want to take over the log of gin-oauth2 using zap, is there any solution?

[szuecs]

@wuzhican right now there is no solution for this. I think what we can do is to use a minimal log interface such that it would satisfy the requirement of the library. In this case I would hop that basically any logger could be able to use.

Do you want to propose a PR?