title: How to downgrade react-native from 0.56.0 to 0.55.4 version?
body: <p>Actually I am using <strong>react-native-camera</strong> in my app but it is not working in this version (react-native: 0.56.0) &amp; its working in this version(react-native: 0.55.4).</p>
  
  <p>So now I want to downgrade the react-native: 0.56.0 to react-native: 0.55.4.</p>
  
  <p>My System configuration:
  npm 6.1.0,
  react-native-cli: 2.0.1,
  react-native: 0.56.0,
  Mac OS, Xcode 9.3</p>
  
  <p>Thank you    </p>