Need sync golang/protobuf version 1.1.0

[GrapeBaBa]

We meet this issue protocolbuffers/protobuf#4582

[awalterschulze]

Most of the work (which was a lot) has been done, but we still have one issue left
golang/protobuf#591 (comment)
Once this is fixed we will merge the dev branch into master and be in sync with golang/protobuf version 1.10

[xjewer]

do you have any news?

[awalterschulze]

We are working on it over here
#412

[awalterschulze]

We finally have a pull request
https://github.com/gogo/protobuf/pull/424/files

And then there are two more commits to merge before releasing 1.1

golang/protobuf@3fac2a2
golang/protobuf@7c4add5

[awalterschulze]

Merged :)

Now just for the last two commits.

[awalterschulze]

Released
https://github.com/gogo/protobuf/releases/tag/v1.1.0