Support autocompletion for custom packages

[msudgh]

I have some custom packages in my project but while importing packages and calling them methods, I don't get any autocompletion.

What's wrong? Does extension support autocompletion for custom packages?

[ramya-rao-a]

VS Code has been using https://github.com/nsf/gocode to provide completions without any issues for a long time. Since gocode has issues with Go 1.10, we were suggested by its author to use a fork of gocode and so we recently moved to using https://github.com/mdempsky/gocode.

The latter has issues with completions for custom packages. This is covered in #1723 and mdempsky/gocode#32. Please subscribe to either of those 2 issues for further updates.