"use strict" and other linty fixes

render/vnode.js

@@ -1,3 +1,5 @@
+"use strict"
+
 function Vnode(tag, key, attrs, children, text, dom) {
 	return {tag: tag, key: key, attrs: attrs, children: children, text: text, dom: dom, domSize: undefined, state: {}, events: undefined, instance: undefined, skip: false}
 }