add google's go style guide
@@ -3354,6 +3354,7 @@ _Where to discover new Go libraries._
- [bahlo/go-styleguide](https://github.com/bahlo/go-styleguide)
- [CockroachDB](https://github.com/cockroachdb/cockroach/blob/master/docs/style.md)
- [GitLab](https://docs.gitlab.com/ee/development/go_guide/)
+- [Google](https://google.github.io/styleguide/go/)
- [Hyperledger](https://github.com/hyperledger/fabric/blob/release-1.4/docs/source/style-guides/go-style.rst)
- [Magnetico](https://github.com/boramalper/magnetico/wiki/magnetico-Design-Specification)
- [Sourcegraph](https://about.sourcegraph.com/handbook/engineering/go_style_guide)
