Implement the Q1 2021 small features release in internal tools.

[leafpetersen]

This tracks internal tooling support for this set of features.

cc @devoncarew @keertip @davidmorgan @franklinyow

[devoncarew]

@davidmorgan - I'm assigning to you (but there may be someone better / more specific).

[leafpetersen]

@keertip any updates?

[devoncarew]

My expectation is that there will be no impact here for Cider. We might want to confirm that there will / won't be any impact for Kythe; cc @davidmorgan @srawlins.

[keertip]

Right, as Devon mentions, as long as the analyzer has the support it should automatically roll into Cider.

[devoncarew]

I'm going to un-assign Keerti w/ there being no assumed work for Cider. @davidmorgan, we probably still need to investigate this for Kythe.

In the future we might want to have separate issues for Cider and Kythe - they have different owners and will likely need different types of changes depending in the specific language feature.

[leafpetersen]

@davidmorgan do we have an internal bug for this?