typescript-beginning-of-defun misses ES2015 forms

[leungbk]

ES2015 classes and class methods, along with stuff like

const foo = (args) => {
  const a = 42;
  return false;
}

are not treated as defuns.

[thiagotps]

Same problem here. Class methods are not treated as defuns.

[josteink]

Can reproduce this. Clearly a bug.