Import support?

[bernardoadc]

Initially dynamic imports should be more than ok. Is there support for this yet? Will it have?

Native imports would be awesome. If not mistaken, esm package can handle things in this sense, so there must be a way to do so.

[toyobayashi]

Actually, now I am not clear how to support native ESM import to keep the same behavior. If I turn this package to an esm package, the Module API hook may need to be rewritten quite a bit. PR welcome