Upgrade TypeScript to ~2.4.0, Fix test cases

Author: Wang Zhongliang

package.json

@@ -71,8 +71,8 @@
     "mocha": "^2.2.5",
     "redux": "4.0.0-beta.2",
     "rimraf": "^2.5.2",
-    "typescript": "^1.8.10",
-    "typescript-definition-tester": "0.0.4",
+    "typescript": "~2.4.0",
+    "typescript-definition-tester": "0.0.5",
     "webpack": "^1.12.14"
   }
 }

test/typescript.ts

@@ -1,18 +1,26 @@
 import {Store, Middleware} from 'redux';
-import thunk, {ThunkAction} from '../index.d.ts';
+import thunk, {ThunkAction} from '../index';
 
+type State = {
+  foo: string
+};
+
+type Actions = { type: 'FOO' };
 
-declare const store: Store<{foo: string}>;
+declare const store: Store<State, Actions>;
 
 store.dispatch(dispatch => {
   dispatch({type: 'FOO'});
 });
 
-store.dispatch((dispatch, getState) => {
-  const state = getState();
+function testGetState(): ThunkAction<void, State, {}, Actions> {
+  return (dispatch, getState) => {
+    const state = getState();
+    const foo: string = state.foo;
+  };
+}
 
-  const foo: string = state.foo;
-});
+store.dispatch(testGetState());
 
 const middleware: Middleware = thunk.withExtraArgument('bar');