Remove cycle in module graph

Hard for some tools to deal with.

Author: Steven Orvell

src/lib/updating-element.ts

@@ -32,8 +32,6 @@ interface AttributeSerializer<T = any> {
 
 type AttributeType<T = any> = AttributeSerializer<T>|((value: string) => T);
 
-export * from './decorators.js';
-
 /**
  * Defines options for a property accessor.
  */

src/lit-element.ts

@@ -17,6 +17,7 @@ import {render} from 'lit-html/lib/shady-render';
 import {PropertyValues, UpdatingElement} from './lib/updating-element.js';
 
 export * from './lib/updating-element.js';
+export * from './lib/decorators.js';
 export {html, svg} from 'lit-html/lit-html';
 
 export abstract class LitElement extends UpdatingElement {