[pkg-go] package naming for kingpin.v3

[Martín Ferrari]

On 16/04/18 12:19, Shengjing Zhu wrote:

>> I was getting ready to upload this same package, which I did not find
>> because of the -unstable suffix.
> 
> but you can't import gopkg.in/alecthomas/kingpin.v3

That is true, but the v3-unstable name should not be used either, as it
is not released (see https://gopkg.in/alecthomas/kingpin.v3-unstable).

I am going to provide the compatiblity symlink, but I think it does not
make sense to have a package with a name that needs to change as soon as
it is released.

-- 
Martín Ferrari (Tincho)