v1.2.0: Remove http basic auth from proxy (#3)
In https://github.com/github/dependabot-update-job-proxy/pull/988 we're removing HTTP Basic Auth from the proxy. While passing them won't cause any issues, it will no longer serve a purpose. It should technically be fine to merge these changes _before_ that lands, as the proxy can currently be ran without setting up basic auth, but let's get that PR to land first.