Update redux type of combineReducers (#41429)

* Update redux-first-router:redux type of combineReducers

It now returns CombinedState<State> instead of just State.

* Also fix @tinajs/tina-redux

* remove unused import in tests

types/redux-first-router/redux-first-router-tests.ts

@@ -127,7 +127,7 @@ const action: ReduxFirstRouterAction = {
 };
 redirect(action); // $ExpectType Action
 
-// $ExpectType Store<State, AnyAction>
+// $ExpectType Store<CombinedState<State>, AnyAction>
 store;
 
 store.getState().location.routesMap; // $ExpectType RoutesMap<Keys, State>

types/tinajs__tina-redux/index.d.ts

@@ -4,7 +4,7 @@
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped/tinajs__tina-redux
 // TypeScript Version: 2.8
 
-import { Store, Dispatch } from "redux";
+import { Store, Dispatch, Action } from "redux";
 
 type MapStateToProps = (state: any) => any;
 type mapDispatchToProps = (dispatch: Dispatch) => any;
@@ -15,8 +15,8 @@ interface HOC {
     methods: object;
 }
 
-declare class TinaRedux {
-    constructor(reduxStore: Store);
+declare class TinaRedux<S, A extends Action> {
+    constructor(reduxStore: Store<S, A>);
     connect(mapState?: MapStateToProps, mapDispatch?: mapDispatchToProps): HOC;
 }
 

types/tinajs__tina-redux/tinajs__tina-redux-tests.ts

@@ -9,14 +9,14 @@ interface Todo {
 
 interface TodoAction extends Action, Todo {}
 
-const intialState: Todo[] = [
+const initialState: Todo[] = [
     { id: 1, text: "Star Tina.js", completed: false },
     { id: 2, text: "Star Tina-Redux", completed: true },
     { id: 3, text: "Build a mini-program with Tina.js", completed: false },
     { id: 4, text: "Add to Showcase of Tina.js", completed: false }
 ];
 
-const todos = (state = intialState, action: TodoAction) => {
+const todos = (state = initialState, action: TodoAction) => {
     switch (action.type) {
         case "ADD_TODO":
             return [