integrate redux dev tools in store file

Author: vishalnagda1

src/store.js

@@ -1,4 +1,4 @@
-import { createStore, applyMiddleware } from "redux";
+import { createStore, applyMiddleware, compose } from "redux";
 import thunk from "redux-thunk";
 import rootReducer from "./reducers";
 
@@ -7,6 +7,9 @@ const middleware = [thunk];
 const store = createStore(
   rootReducer,
   initialState,
-  applyMiddleware(...middleware)
+  compose(
+    applyMiddleware(...middleware),
+    window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
+  )
 );
 export default store;