title: Warnings about peer dependencies when running npm install
body: <p>I'm trying to update my React/Firebase project with</p>
  
  <pre><code>npm install --save firebase-functions@latest
  </code></pre>
  
  <p>and I get a lot of warnings:</p>
  
  <pre><code>npm WARN google-maps-react@2.0.0 requires a peer of react@~0.14.8 || ^15.0.0 || ^16.0.0 but none is installed. You must install peer dependencies yourself.
  npm WARN google-maps-react@2.0.0 requires a peer of react-dom@~0.14.8 || ^15.0.0 || ^16.0.0 but none is installed. You must install peer dependencies yourself.
  npm WARN firebase-functions@1.0.1 requires a peer of firebase-admin@~5.12.0 but none is installed. You must install peer dependencies yourself.
  </code></pre>
  
  <p>I'm a newbie so not sure which command should I run to fix the warnings.</p>