Update utils.spec.ts to not use .toThrow.
Update utils.spec.ts to not use .toThrow.

The reason is that Expect.toThrow which doesn't work for async functions.

01alchemist/TurboScript,01alchemist/TurboScript,01alchemist/TurboScript,01alchemist/TurboScript,01alchemist/TurboScript,01alchemist/TurboScript