title: `Firebase/Auth` dependency were found, but they required a higher minimum deployment target
body: <p>Google just updated their Firebase core of products and several old methods are deprecated. One I aim to integrate is: <code>Firebase/Auth</code>, however, importing into the podfile, and running: <code>pod install</code>, yields the error:</p>
  
  <pre><code>[!] Unable to satisfy the following requirements:
  
  - `Firebase/Auth` required by `Podfile`
  
  Specs satisfying the `Firebase/Auth` dependency were found, but they required a higher minimum deployment target.
  </code></pre>
  
  <p>However, when looking at the build target, I have it set to the latest version:</p>
  
  <p><a href="https://i.stack.imgur.com/H8hAV.png" rel="noreferrer"><img src="https://i.stack.imgur.com/H8hAV.png" alt="enter image description here"></a></p>
  
  <p>How can I alleviate this error?</p>