`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.
`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.

developit/preact,gogoyqj/preact,neeharv/preact,developit/preact,neeharv/preact