redux

Converts the codebase to TypeScript

Updates the packaging for better ESM/CJS compatibility and modernizes the build output

Requires that action.type must be a string

next would be typed to have all of the dispatch extensions, including the ones earlier in the chain that would no longer apply.

action is not necessarily a known action, it can be literally anything - for example a thunk would be a function with no .type property (so AnyAction would be inaccurate)

The Reducer, ReducersMapObject, and createStore/configureStore types/function take an additional PreloadedState generic which defaults to S.

The overloads for combineReducers are removed in favor of a single function definition that takes the ReducersMapObject as its generic parameter. Removing the overloads was necessary with these changes, since sometimes it was choosing the wrong overload.

Enhancers that explicitly list the generics for the reducer will need to add the third generic.