title: com.facebook.react.common.javascriptexception : unexpected token ‘export’
body: <p>i am using React Native 0.59.3 after i install package react-native-background-timer it given me error like that.</p>
  <p>com.facebook.react.common.JavascriptException : Unexpected token ‘export’</p>
  <p>And</p>
  <p>unexpected reserved word use ‘class’</p>
  <p>Anyone can help me ?</p>
  <p><a href="https://i.stack.imgur.com/X0JDN.jpg" rel="nofollow noreferrer">error 1</a>
  <a href="https://i.stack.imgur.com/bomMo.jpg" rel="nofollow noreferrer">error 2</a></p>