immutable-js/immutable-js 2.5.1

on GitHub

Fixes:

• updateIn could fail to set a value if it matched the default value, or if it looked like an empty collection.
• base Sequences no longer have unsafe specialized toArray and toObject functions which could cause accidental mutation of the immutable Sequences.
• hashing uses WeakMap if available, resulting in a best possible case of not touching JS objects used as keys.
• Distribution files are now lowercase.js, matching the package name to aleviate any confusion or case-sensitive file system woes.