Transform identifiers to look like idiomatic JavaScript

[oleavr]

Where names of properties, methods, and signals are in camelCase instead of PascalCase.

I don't know if this would be an acceptable direction to go in, so I didn't update the tests – but happy to do that if this is of interest.

[acrisci]

This is a great idea and I would love to merge this, but it would break every application that uses this library, so I can't. Sorry.