Modernizing dom-expressions

[titoBouzout]

I have been having some issues with the require vs imports stuff. I would appreciate an update to dom-expressions that modernizes it in a way that import just works out of the box.

I know dom-expressions version 2 it's in our thoughts, but before that happens I suggest a modernization, to allow us keep contributing without friction.

Just to illustrate the problem, I had trouble to add tests for functions that expect import in one place, but the same function expect require in the test case (or reversed, the environment changes in someway). I cannot reuse the function without duplicating it to a new place, which means it will require updates whenever any of the two functions change. So I didn't add the tests, and that's not cool.

I am asking, but I don't know what are the implications or required effort to get into such a shape, so please do not take me wrong. If it is doable, take this post as pushing kindly to it.

Thanks!