title: how to Change my app's target API level from 23 to 26
body: <p>I have a problem when i try to upload my app to google play console and it is the API level that is must be 26 and my app is just developped with 23 version and now i don't know how to change this API version from 23 to 26 to make it works without errors.</p>
  
  <p>Help me please!</p>