consider showing test-only dependencies

[thepudds]

The ability to more easily see what are test-only dependencies for modules is a common request for cmd/go.

Consider supporting it here, either by highlighting a test-only dependency or by highlighting a non-test dependency.

There are different ways to determine this, but one way is this, which shows the modules used in your build excluding test-only dependencies:

go list -deps -f '{{with .Module}}{{.Path}} {{.Version}}{{end}}' ./... | sort -u

[josharian]

I'd be happy to review a PR that implemented this. Maybe it'd be another entry in the L/W/M/bomb column?