deno bundle should contain inlined source maps

[lucacasonato]

Bundles do not contain inline source maps. We should emit and inline the source maps for bundles.

[kitsonk]

This needs to be related to #4499, because emitting them and consuming them need to happen to be useful to Deno.

[satyarohith]

Working on it.

[rotu]

Thanks, @satyarohith! I'm excited to be able to debug Deno-bundled ts files!

[jed]

In the meantime, I wrote an installable script as a drop-in replacement for deno bundle that inlines the sourcemap generated by Deno.emit.