dominikh/go-tools 2017.2.2

Staticcheck 2017.2.2

on GitHub

Staticcheck 2017.2.2 fixes minor issues in unused, keyify and staticcheck:

• unused: correctly apply the NoCopy exemption when using the -exported flag.
• keyify: support external test packages (package foo_test)
• staticcheck: disable SA4005 – the check, in its current form, is prone to false positives and will be reimplemented in a future release.