Add Linkerd to list of projects using Cobra

[scottcarol]

This PR adds Linkerd to the list of projects using Cobra.

[CLAassistant]

All committers have signed the CLA.

[scottcarol]

is there a way to re-trigger the Travis CI build?

[umarcor]

is there a way to re-trigger the Travis CI build?

Not directly, unless you are a maintainer of the repo.

However, you can trigger it indirectly by updating branch scottcarol:patch-1 in your fork. You can either push a 'dummy' commit (which should be squashed when merged), or you can update the existing commit (maybe --ammend it) and force push to your branch. Any of these will make Travis run the jobs again.

Nonetheless, note that the error is unrelated to your changes. The underlying problem is an issue in the current master branch that affects almost every PR. Hence, you won't get rid of the error until a fix (such as #889) is merged.

[jharshman]

@scottcarol rebase against master and the shellcheck errors should clear up.

[scottcarol]

Thanks for the context @umarcor and @jharshman, will do.