Add resource node + improve default mods

src/nodes/ObjectNode.ts

@@ -10,9 +10,9 @@ export class ObjectNode extends AbstractNode<IObject> {
   protected fields: NodeChildren
 
   constructor(fields: NodeChildren, mods?: NodeMods<IObject>) {
-    super(mods, {
-      default: () => ({})
-    })
+    super({
+      default: () => ({}),
+      ...mods})
     this.fields = fields
     Object.values(fields).forEach(child => {
       child.setParent(this)