title: Vue 2; export 'default' (imported as 'firebase') was not found in 'firebase/app'
body: <p>I'm trying to import firebase in a Vue 2 app, but I'm running into this annoying issue.</p>
  <p>My imports look like:</p>
  <pre><code>import firebase from 'firebase/app'
  import 'firebase/auth'
  import 'firebase/firestore'
  </code></pre>
  <p>but when I serve it, I get:</p>
  <blockquote>
  <p>export 'default' (imported as 'firebase') was not found in 'firebase/app'</p>
  </blockquote>
  <p>...and my views don't render or route.</p>
  <p>My version of firebase is 9.0.0 off of npm.</p>