Add support for loading ECMAScript modules (#222)

[tdanecker]

As mentioned in #222 (comment), there are two caveats:

• watch mode is not be supported for ECMAScript modules as the loader cache can't be invalidated (Invalidate cache when using import nodejs/node#49442)
• to keep downward compatibility with NodeJS < 16, the dynamic import for the ECMAScript module has to be wrapped in an eval statement (Add flag to not transpile dynamic import() when module is CommonJS microsoft/TypeScript#43329 (comment))

[gpotter2]

Thanks a lot for the PR and looking into this !
Would you mind also adding the parameter to the table in the README.md ? Thanks