Simplify readme example with top level await

README.md

@@ -26,7 +26,7 @@ npm install --save-dev create-test-server
 ```js
 const createTestServer = require('create-test-server');
 
-createTestServer().then(server => {
+const server = await createTestServer();
 console.log(server.url);
 // http://localhost:5486
 console.log(server.sslUrl);
@@ -43,7 +43,6 @@ createTestServer().then(server => {
 server.get('/foo', 'bar');
 
 // server.url + '/foo' and server.sslUrl + '/foo' will respond with 'bar'
-});
 ```
 
 The following `Content-Type` headers will be parsed and exposed via `req.body`: