Support other targets with Deno.bundle

[kitsonk]

Currently the bundle loader requires ES2017+. That means it isn't suitable for other targets and it isn't transpiled on the fly.

Originally I though we should just transpile for every target, but I think it is just easier to just have a single transpiled version that targets ES5 and if the target is less than < ES2017 it uses ES5. ES3 isn't a realistic target to support for deno bundle or Deno.bundle.

[iugo]

How to use deno bundle target to ES5?

There are no related options in deno bundle --help.

When I use tsconfig.json "compilerOptions": { "target": "es5" }, tips "Unsupported compiler options".

deno 1.3.1