Override reports error when not all intermediate classes implement method

[HaKr]

The documentation states:

Checks that the marked method indeed overrides a function with the same signature somewhere on the prototype chain.

Yet, a syntax error gets thrown when an overridden method does not appear in all ancestors.

SyntaxError: No descriptor matching C#one() was found on the prototype chain.
Did you mean "one"?

class A {
   public one() { return 1; }
}

class B extends A {
   // Syntax error disappears when the line below is included  
   // public one() { return super.one(); }

   public two(y: number) { return y + this.one(); }
}

class C extends B {
   @override
   public one() { return 42; }
}

const c = new C();
console.log(c.two(2));

Looks related to #62