title: Fastlane: How to load .env file from parent directory according to --env
body: <ol>
  <li>I know that Fastlane automatically load variables from <code>.env</code>, <code>.env.default</code> and <code>.env.{environment}</code>, where <code>environment</code> is supplied by the flag <code>--env</code> in the <code>fastlane</code> command.</li>
  <li>In my <code>Fastfile</code>, I need fastlane to load my environment files, that are located <em>in the parent directory</em>.</li>
  <li>I want to keep the behavior of loading of loading the <code>.env.{environment}</code> file, when <code>{environment}</code> changes according to what I pass in the <code>--env</code> flag.</li>
  </ol>