Docs: update "import createLogger" to modern "import { createLogger }" (reduxjs#2325)

Author: Vadim Vinogradov

docs/advanced/AsyncActions.md

@@ -390,7 +390,7 @@ How do we include the Redux Thunk middleware in the dispatch mechanism? We use t
 
 ```js
 import thunkMiddleware from 'redux-thunk'
-import createLogger from 'redux-logger'
+import { createLogger } from 'redux-logger'
 import { createStore, applyMiddleware } from 'redux'
 import { selectSubreddit, fetchPosts } from './actions'
 import rootReducer from './reducers'

docs/advanced/ExampleRedditAPI.md

@@ -165,7 +165,7 @@ export default rootReducer
 ```js
 import { createStore, applyMiddleware } from 'redux'
 import thunkMiddleware from 'redux-thunk'
-import createLogger from 'redux-logger'
+import { createLogger } from 'redux-logger'
 import rootReducer from './reducers'
 
 const loggerMiddleware = createLogger()