Specs: default exports to {} rather than document, since it makes writing modules saner

sky/examples/htmlish/framework/element.sky

 SKY MODULE - defines an <element> element
 <import src="sky:core" as="sky"/>
 
 <!-- usage:
 
    <element name="tagname">
     <style> style here (optional) </style>
     <template> shadow tree here (optional) </template>
     <script> // optional
      module.currentScript.parentNode.setPrototype({
        init: function () {
          // constructor here
        },
        // rest of api here
      });
     </script>
    </element>
 
 -->
 
 <script>
  module.exports.Element = sky.registerElement({
    tagName: 'element',
-   prototype: class extends Element {
+   constructor: class extends Element {
      constructor (module) {
        super();
        this.state = 'loading';
        this.module = module;
        this.definedPrototype = sky.Element;
      }
      setPrototype(prototype) {
        this.definedPrototype = prototype;
      }
      endTagParsedCallback() {
@@ skipping 28 matching lines @@
          shadow: style || template,
          constructor: constructor,
        });
        delete this.definedPrototype;
        delete this.module;
        this.state = 'loaded';
      }
    },
  });
 </script>