id: require-await
valid:
  - 'async function f() { return await x }'
  - 'function f() { return 1 }'
  - 'async function f() { await x; return y }'
invalid:
  - 'async function f() { return 1 }'
  - 'async function f() { return x }'
  - 'async function f() { console.log("hi") }'