Update gin version (#790)

* Revert "Merge pull request #753 from gin-gonic/bug"

This reverts commit 556287ff0856a5ad1f9a1b493c188cabeceba929, reversing
changes made to 32cab500ecc71d2975f5699c8a65c6debb29cfbe.

* Revert "Merge pull request #744 from aviddiviner/logger-fix"

This reverts commit c3bfd69303d0fdaf2d43a7ff07cc8ee45ec7bb3f, reversing
changes made to 9177f01c2843b91820780197f521ba48554b9df3.

* Update gin version