Fixes random test failures by waiting for server to start

[jamonholmgren]

Thanks to @shellscape for the heads-up on this!

We were getting random failures in our test suite due to the tests not waiting for the server(s) to start before running the tests.

This changes createServer to be an async function, which waits for the server to start before initiating the tests.

[infinitered-circleci]

:tada: This PR is included in version 2.1.4 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: