ob-async uses org-babel-load-languages to load babel packages in a child
process, but packages entered into the org-babel-load-languages variable
by Doom's lazy loader were misnamed. This caused load errors in the
child process.
The language-to-package resolution is now performed before it is entered
into org-babel-load-languages. Additionally, ob-async will now be lazy
loaded if it is available (and fail silently otherwise).
2d13dbe10a