title: EsLint gives me error "Parsing error: Cannot read property 'map' of undefined" when writing a valid tuple type
body: <p>This is an example, I think it's a valid tuple types</p>
  <pre><code>export type SomeType = [ string, boolean ]
  </code></pre>
  <p>I don't know why eslint gives me this error</p>
  <p><a href="https://i.stack.imgur.com/xGVGU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xGVGU.png" alt="enter image description here" /></a></p>