feat: add support for more component types (Custom Element classes and D3 functions)

[pemrouz]

Besides having both stateless and stateful components as pure functions of data, it would be good to also add support for the new Custom Elements style classes and the more traditional D3 components. D3 components should be straightforward given it was the source of the inspiration for the current components. Classes would be expected to have a similar declarative render function (draw) but also allows developers to more neatly setup other methods/accessors/lifecycle hooks/etc. This should also improve interop.

Classical D3 Component

function chart() {
 var width = 720, // default width
 height = 80; // default height

 function my() {
 // generate chart here, using `width` and `height`
 }

 my.width = function(value) {
 if (!arguments.length) return width;
 width = value;
 return my;
 };

 my.height = function(value) {
 if (!arguments.length) return height;
 height = value;
 return my;
 };

 return my;
}

Custom Element Class

class MyComponent extends HTMLElement {
 // can move name and other meta data here..
 name: 'my-component' 

 get width(){ 
 return this._width
 }

 set width(value){ 
 this._width = value
 }

 draw(node, data) {
 // update node
 jsx(node)`
 ...
 `
 }
}