buildBabelOptions returns some things that aren't valid babel options

[ef4]

annotation and throwUnlessParallelizable are returned by buildBabelOptions(), but they aren't really babel options, they're broccoli-babel-transpiler options.

This came up because in ember-auto-import I'm trying to automatically configure a babel parser based off the app's babel configuration.

I think these options should be kept separate from the real babel options.

[ef4]

Just hit another example, which is the weird not-really-a-plugin entry with _parallelBabel that we put into the plugins list.

[rwjblue]

@ef4 Think we should avoid adding them and make a private internal API for when we have to talk to broccoli-babel-transpiler?

[ef4]

Or at least keep them together under a single property within the Babel config, so it’s easier to split them back out.

[rwjblue]

FWIW, this will be resolvable with #371.

[lifeart]

may be related embroider-build/ember-auto-import#267