Less polyfills

[rektide]

Using timesync brings in Promise.js and emitter.js, which are files which a browser will not need. It would be great to be able to use timesync without bringing in these unnecessary files.

[josdejong]

Thanks @rektide , I think we can indeed remove Promise from the bundle.

[pip8786]

I'm trying to use this package with a CRA + socket.io webapp, and without installing promise it fails to compile since window and window.Promise don't exist at compile time. However, they will exist at runtime in the browser so installing and requiring promise is a bit unnecessary in that case. As far as I can tell, there's no way around installing promise in an un-ejected CRA app since I can't define a bogus webpack plugin to fool the compiler.

Is there a way we could update this to have a client side package that doesn't require promise?

[josdejong]

I think the best solution is to drop this polyfill from the library as proposed in this issue :)

Will be a breaking change so we have to publish as v2.0.0.

Help would be welcome, shouldn't be too much work.