Adding 'transform-symbol-member' transform to preset. #5824
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Turns out, even after discussion that was had in #5294 (comment), we really do need this transform.
I've just included it in the preset...let me know if you all would rather publish to npm.
The actual reason why this is necessary is because in the latest sync from FB, fbjs was updated to use the
Symbol.iterator
express in it's isEmpty function: facebook/fbjs@064a484We use this in RN in the ListView...and this change (once #5084 is merged) will cause ListView to break on older JSC context's.
This resolves that, and is probably something we should have had all along.