title: Typescript optional chaining
body: <p>Hi beautiful community,</p>
  
  <p>sorry for my dumb question, but can you explain me how I can use the optional chaining of typescript 3.7?</p>
  
  <p>In the documentation it says I can simply use it like: foo?.bar?.baz</p>
  
  <p>Im using IntelliJ with tslint. Somehow my IDE is not recognizing the optional chaining.</p>
  
  <p>What am I doing wrong? Is it a tslint problem or is it because ES is not supporting it?</p>
  
  <p>Best Regards</p>