Migrate Idler

Summary: _typescript_

Reviewed By: danielbuechele

Differential Revision: D16763946

fbshipit-source-id: 96eb0cdaca8a6cd731a6d16f3bea02471c691c01

src/utils/Idler.tsx

@@ -5,7 +5,7 @@
  * @format
  */
 
-import {CancelledPromiseError} from './errors.tsx';
+import {CancelledPromiseError} from './errors';
 
 export class Idler {
   lastIdle: number;

src/utils/__tests__/Idler.node.js

@@ -5,7 +5,7 @@
  * @format
  */
 
-import {Idler} from '../Idler';
+import {Idler} from '../Idler.tsx';
 
 test('Idler should interrupt', async () => {
   const idler = new Idler();

src/utils/serialization.js

@@ -5,7 +5,7 @@
  * @format
  */
 
-import {Idler} from './Idler';
+import {Idler} from './Idler.tsx';
 export async function serialize(
   obj: Object,
   idler?: Idler,