Use `console.warn`, `console.error`, `console.info`, `console.debug` as appropriate

[lilyball]

Right now this crate logs everything through console.log. This means I can't do any browser filtering of events. It would be really nice if it could use console.info, console.warn, console.error, and console.debug as appropriate. This would give me better filtering control and also better styling.

[lilyball]

You might also want to look at what wasm-logger does for its mapping.