Dashboard: Apply finishing touches for beta release (Gopkg.lock/toml, APIs?)

[a-roberts]

Pipelines Beta is now live, we currently reference rc3 in our Gopkg toml when we can instead of use 0.11.0.

In addition, we've got plenty of backend code still using v1alpha1 imports, see https://github.com/tektoncd/dashboard/blob/master/pkg/controllers/tekton/taskrun.go#L7 for example. @vdemeester remind me again please why these are OK to be alpha still, or should they change? 😸

[vdemeester]

I think they should change but as the controller does auto convert and the webhook serves both, it's "meant" to work still :stuck_out_tongue:

[a-roberts]

I think they should change but as the controller does auto convert _and_ the webhook serves both, it's "meant" to work still 😛

Yeah I haven't noticed any problems with it, so gonna keep at least for now, thanks

[a-roberts]

Merged now so closing 🎂