example in readme does not compile about wolf-ecs

[EnderShadow8]

Sorry about the inconvenience, but I don't believe you should use this for anything substantial.

I originally made this project to demonstrate the speed limit for JS ECS, however, in the process of making everything fast, I slowly sacrificed usability to the point where this serves only as a demonstration of speed in benchmarks, and nothing more. I'm hoping that ideas I've developed will make their way into more mature projects such as https://github.com/NateTheGreatt/bitECS

In the meantime, I'll update the readme to include this information, as I never got round to doing it and forgot.

Thanks for checking it out anyway! 😄