fixes #8: TypeError: server.stop is not a function

Author: svycka

index.js

@@ -33,7 +33,7 @@ module.exports = (api, options) => {
  const conf = config.get();
 
 
- if (server) conf.teardown = () => server.stop();
+ if (server) conf.teardown = () => server.close();
 
  // create runner
  let runner = new codecept(conf, { ...opts, ...args });