title: Flipper cannot be opened because the developer cannot be verified in macOS Catalina
body: <p><code>Flipper</code> is a platform for debugging iOS, Android and React Native apps.
  I have downloaded the <code>Flipper</code> app from <a href="https://fbflipper.com/" rel="noreferrer">https://fbflipper.com/</a>, but I can't run it.</p>
  <p><a href="https://i.stack.imgur.com/eDtz1.png" rel="noreferrer"><img src="https://i.stack.imgur.com/eDtz1.png" alt="Error image" /></a></p>
  <p>macOS version: <code>Catalina 10.15.3</code></p>