Offer an ECMA Module version

[leonard84]

I'm using url-assembler in an Angular app, and Angular complains about using a commonJS module.
Would it be possible to convert this to an ECMA Module, or offer a ECMA Module version?
The ECMA version could then be the source of a converted commonJS version if that format is still necessary.

See also
https://web.dev/commonjs-larger-bundles/
https://angular.io/guide/build#configuring-commonjs-dependencies

[Floby]

I'm happy to accept a Merge Request for this functionnality =)