Road to v1.0

[josevalim]

• Stabilize formatter APIs
• Stabilize language APIs (only after Elixir adds new type metadata to chunks, depends on Refactor autolinking typespecs #1815)

[a-maze-d]

What about moving away from dependencies that are marked as deprecated?

Example: Karma

[josevalim]

There are definitely chores we can tackle (and a PR moving away from Karma is welcome), but those can be done at any time without affecting the user-facing API. The goal of this issue is to track what can still change and impact users.