Convert utils/processConfig to TS

Reviewed By: danielbuechele

Differential Revision: D16710602

fbshipit-source-id: 3dbccdb0aedd3d5415487d690fb943aafdafa0f0

src/utils/__tests__/processConfig.node.js

@@ -5,7 +5,7 @@
  * @format
  */
 
-import {default as config, resetConfigForTesting} from '../processConfig.js';
+import {default as config, resetConfigForTesting} from '../processConfig.tsx';
 
 afterEach(() => {
   resetConfigForTesting();