Should Jessie allow `new.target`?

[gibson042]

Without it, I think proper subclass emulation is impossible:

const Ctor = function (...args) {
  // @jessie.js/eslint-plugin disallows all meta-properties, including `new.target`.
  // eslint-disable-next-line no-restricted-syntax
  return Reflect.construct(parent, args, new.target ?? Ctor);
};
Object.defineProperty(Ctor, 'name', { value: name });
Object.setPrototypeOf(Ctor, parent);
Object.setPrototypeOf(Ctor.prototype, parent.prototype);

However, since Subsetting EcmaScript documents exclusion of Reflect as well, I think that's intentional... such an endowment is of course possible, and such an environment has already accepted the complexity of ECMAScript classes, but it would still be a parsing imposition on all Jessie implementations to allow new at the start of a MemberExpression iff followed by symbols . and target.

And finally, note that even if new.target remains disallowed, the current "'import.meta' is not allowed in Jessie" error message is incorrect so use-jessie-rules.js should be updated regardless, e.g.:

     {
       selector: `MetaProperty`,
-      message: `'import.meta' is ${nono}`,
+      message: `meta-properties like 'import.meta' and 'new.target' are ${nono}`,
     },