Make dax extension friendly about dax HOT 2 CLOSED

@dsherret maybe if you have time you can check https://github.com/impactaky/dax_extras and share your thoughts

In particular is it a good idea to try to extend dax from another module, and is there a better way then the current approach

from dax.

Actually I like the latest idea impactaky/dax_extras#25

We just put dax version at the suffix of dax extras version, and the user have to match them correctly

import $ from "https://deno.land/x/[email protected]/mod.ts";
// the dax version used internally by dax extras is at the suffix
// it **must** match the dax version used
import "https://deno.land/x/[email protected]/mod.ts";

from dax.