Match xplat/yoga/javascript prettier conventions

Summary:
Match Prettier config to match other Meta OSS projects

Didn't update the test generator to use this form yet.

Reviewed By: yungsters

Differential Revision: D45570415

fbshipit-source-id: d5fd791b047debf41c28aecac75fb8dde16da3e3

javascript/src_js/entrypoint/asmjs-async.js

@@ -7,5 +7,5 @@
  * @format
  */
 
-const asm = require("../build/asmjs-async");
-module.exports = require("./_entryAsync")(asm);
+const asm = require('../build/asmjs-async');
+module.exports = require('./_entryAsync')(asm);