Detect and display when new major versions of semver'ed import paths are available.

[dmitshur]

For example, if I have foo/bar.v4 in my GOPATH, and foo/bar.v5 becomes available, perhaps Go Package Store is an excellent opportunity to let me know about that?

[brasilikum]

Yea, you mean something like a big red label?

[dmitshur]

Yes, something like that, but it doesn't necessarily have to be red.