3.4.0

New:

• Improved documentation in Immutable.d.ts, resulting in better generated documentation.
• remove and removeIn are now alises for the methods delete and deleteIn. No effect on execution (but deleteIn is new).
• Added deleteIn on Record.
• Added hasIn - deeply query for value existence.
• Cursor onChange function can now intercept the new value and return an override (3598f8c).
• +0 and -0 are treated as the same value in Immutable.is (key equality and Set existence).
• valueOf() is now used when determining value equality between two objects. This allows Date to be used as Map key, and provides a more straight-forward way to implement value equality for custom types.

Fixes:

• Mapping over infinite Seq no longer throws error about Infinite iteration. (Improve accuracy of infinite iteration warning overall).
• Ensure setIn can set undefined as a value.
• List iterators no longer return invalid values if the List was the result of a slice or shift.