Add feature labels to pending deprecations (#2770)
Add feature labels to pending deprecations (#2770)

This adds a feature label to the deprecations that are for pending
features so we can more easily identify them in the future.
AaronSikes/website,bmac/website,bmac/website,SaladFork/emberjs-website,SaladFork/emberjs-website,AaronSikes/website,bmac/website,AaronSikes/website,kpfefferle/website,bmac/website,SaladFork/emberjs-website,kpfefferle/website,SaladFork/emberjs-website,kpfefferle/website