Compatible with immutable v4?

[matthias-ccri]

Hello,

With the release of immutable version 4, is this library still compatible with it?

See release notes and breaking changes: https://github.com/immutable-js/immutable-js/releases/tag/v4.0.0

Notable breaking changes affect merge and mergeDeep.

[glenjamin]

Nothing jumps out from the changelog that should have changed

If someone who is actively using this library would like to check properly that would be great.