message: using correct time source
diff: @@ -186,7 +186,7 @@ describe("Context", () => {
  return Offline(context => {
  const transport = new Transport({context});
  transport.context.setTimeout(() => {
  - expect(Tone.now()).to.be.closeTo(0.01, 0.005);
  + expect(transport.now()).to.be.closeTo(0.01, 0.005);
  }, 0.01);
  }, 0.05);
  });
  