You added es bundle, but forgot about sideEffects:false

[a-x-]

No description provided.

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[a-x-]

What wrong with your ci? :)

[IllusionMH]

Compromised flatmap-stream and event-stream were unpublished from npm. More info: https://blog.npmjs.org/post/180565383195/details-about-the-event-stream-incident

Dependencies should be updated in yarn.lock

[ablakey]

@a-x- have you tested if this change causes tree shaking to work? Does it work well with the current structure of Immutable? There's so much unused code I drag along in projects. I would love to see this capability be supported.

Any help I can offer in testing, updating documentation?