title: Why is typescript compiler changing my tsconfig.json file on server start up?
body: <p>I'm trying to move my react app to a react-typescript app. firstly, this seems really tricky which is disappointing</p>
  
  <p>the issue I'm having is that I get typescript errors in my console. I'm trying to fix them by changing my tsconfig.json file</p>
  
  <p>but whenever I do and restart the server, I get a message in the console saying: <code>the following changes are being made to your tsconfig.json file</code>
  and then it lists the changes which are basically <code>"undos"</code> of the stuff I've just added or changed. why would it do this?</p>
  
  <p>it is a create-react-app project and I followed this to migrate to typescript: <code>https://facebook.github.io/create-react-app/docs/adding-typescript</code></p>