zcf.makeInvitation accepts an undefined offerHandler but getting the offerResult errors

[katelynsills]

What is the Problem Being Solved?

test(`zcf.makeInvitation - no offerHandler`, async t => {
  const { zcf, zoe } = await setupZCFTest();
  const invitationP = zcf.makeInvitation(undefined, 'myInvitation');
  const invitationIssuer = await E(zoe).getInvitationIssuer();
  const isLive = await E(invitationIssuer).isLive(invitationP);
  t.truthy(isLive);
  const seat = E(zoe).offer(invitationP);
  // const offerResult = await E(seat).getOfferResult();
  // t.is(offerResult, undefined);
  await t.throwsAsync(() => E(seat).getOfferResult());
});

Description of the Design

We should have a default no-op offerHandler that returns void.

Security Considerations

None

Test Plan
ZCF Tests (how this was found)