Fixed a bug relating to custom-elements's first vnode where render(){ return <div class="example" /> } would set the example-class on the custom-element itself.

Added support for className and style similar to react
Cleaned up some comments
Reworked how tests are built in order to add a new test "pdf" which was a small side-project where previous mentioned bug showed up, it's an example using HTML to create a PDF for printing

tests/basic/page.jsx

@@ -0,0 +1,12 @@
+import {defineElement, render, CustomElement} from "../../packages/csx";
+
+@defineElement('example-page')
+export class ExamplePage extends CustomElement{
+    connectedCallback() {
+        this.appendChild(render(
+            <div class="page">
+                <h1>This page is an example!</h1>
+            </div>
+        ));
+    }
+}