docs(readme): fix example code syntax error (#1014)

* docs(readme): fix example code syntax error
* chore(README): lint fix

---------

Co-authored-by: Steven Chim <655241+chimurai@users.noreply.github.com>

Author: 17hz

README.md

@@ -38,17 +38,16 @@ import type { Filter, Options, RequestHandler } from 'http-proxy-middleware';
 const app = express();
 
 const proxyMiddleware = createProxyMiddleware<Request, Response>({
-    target: 'http://www.example.org/api',
-    changeOrigin: true,
-  }),
+  target: 'http://www.example.org/api',
+  changeOrigin: true,
+});
 
 app.use('/api', proxyMiddleware);
 
 app.listen(3000);
 
 // proxy and keep the same base path "/api"
 // http://127.0.0.1:3000/api/foo/bar -> http://www.example.org/api/foo/bar
-
 ```
 
 _All_ `http-proxy` [options](https://github.com/nodejitsu/node-http-proxy#options) can be used, along with some extra `http-proxy-middleware` [options](#options).