title: flutter_launcher_icons not working Unhandled exception: FormatException: Invalid number (at character 1)
body: <p>I want to change my app icon in flutter using flutter_launcher_icons: ^0.9.2 <br>
  It shows me errors while I'm running Command <code>flutter pub run flutter_launcher_icons:main</code> <br>
  <a href="https://i.stack.imgur.com/uSZ5l.png" rel="noreferrer">Image of the error</a></p>
  <p><br>
  I tried many times but no new results</p>