Use the newly fixed debugging information

[daxpedda]

Just dropping some random thoughts before I forget them.

• Using it in wasm-bindgen-test instead of console_error_panic_hook (don't replace it entirely because we still need the panic message).
• Add a new documentation page noting how to actually deploy it.
  • Generate sourcemaps, e.g. using wasm2map.
  • Strip DWARF in case of sourcemaps.
  • Notes on browser support and how to serve source files if not bundled.
• Maybe think about adding an option to generate source maps or split debug info directly in wasm-bindgen, but I would argue this would be more the domain of wasm-pack and co.

[ranile]

A page in the documentation about this information would be very helpful