Summary: In advance of peppering async everywhere, allow subcmd's run method to be async.
Reviewed By: genevievehelsel
Differential Revision: D21892187
fbshipit-source-id: f611faacf95649d8bb5588aeefc4546bd5f63984
Summary:
D21316793 is blocked from landing because there are a few targets in eden that are running pyre via buck targets integration.
We can't do custom version overrides for projects that are using a mix of local configurations and buck integration, because buck doesn't provide an interface for setting the equivalent pyre version override.
We're moving away from buck targets integration for pyre across the board, and I've run a codemod over the project to clean up all of the buck typing integration (including some residual mypy) as well as updated type ignores / fixmes accordingly.
Let me know if you have any concerns; upon skimming it looks like most changes are either converting `type: ignore`s into fixmes, or removing `type: ignores`.
Reviewed By: dkgi
Differential Revision: D21343093
fbshipit-source-id: 5ee1436377eb526c0a679fb821c42e07cbca52a5
