fix(security): Follow up on CVE-2020-28477 where `path: [["__proto__"…

…], "x"]` could still pollute the prototype

fix: release missing dist/ folder

chore: fix docs deployment attempt 3

fix: isPlainObject: add quick comparison between input and `Object` t…

…o short-circuit taxing `Function.toString` invocations (immerjs#805)

fix: immerjs#785 fix type inference for produce incorrectly inferring…

… promise (immerjs#786)

fix: immerjs#768 `immerable` field being lost during patch value clon…

…ing (immerjs#771)

feature: Improved typescript types

The TypeScript typings of Immer have been rewritten, and support better inference now and are more accurate. The best practices are documented here: https://immerjs.github.io/immer/typescript. Please visit that page first when running into any compile errors after updating. 

The following changes have been made:

Immer can now infer the type of the `draft` for curried producers, if they are directly passed to another function / context from which the type can be inferred. So lines like these will now be strongly typed: `setTodo(produce(draft => { draft.done = true }))`, where `setTodo` is a React state updater (for example). Fixes immerjs#720.

Immer will now better respect the original types passed to a producer, and generally not wrap any returned types with `Immutable` automatically.

BREAKING CHANGE: It is no longer allowed to return `nothing` from a recipe if the target state doesn't accept `undefined`.

BREAKING CHANGE: It is no longer allowed to return arbitrary things from a recipe. Recipes should either return nothing, or something that is assignable to the original state type. This will catch mistakes with accidental returns earlier.

docs: add `break` to `switch` block (immerjs#769)

I get that there's only one `case` here but for people plucking this example
and then using it to build out their own reducer, they'll immediately run into
issues as soon as they add a second `case` with no `break` in the first.

fix: new Immer().produce now has the same type as produce. Fixes imme…

…rjs#749

fix: Add a type-checking fast path for primitive types (immerjs#755)

When `Draft<T>` is applied to a large enum type, TypeScript has to do a
lot of unnecessary structural comparisons to confirm that no element of
the enum matches `Function`, `Date`, `RegExp`, etc.  Determining that
they do match `string` or `number`, on the other hand, is trivial.  This
change splits `PrimitiveType` out of `AtomicObject` so that the fast
path can be checked first.

In microsoft/TypeScript#42824, this cut the
check time from ~2.5 seconds to ~0.3 seconds.