preactjs/preact 3.2.0 on GitHub

Bugfix: pass context through recycled constructors (with this react-redux is now fully supported!)
linkState() when used with top-level keys (ie, not dot-notated) will no longer mutate this.state in-place.

(Nested keys can and will still mutate this.state, since the implementation of immutable state traversal would essentially be a small immutability library, not something Preact core can justify)