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/index.d.ts

@@ -7,9 +7,9 @@
  * @format
  */
 
-import type { Yoga } from "./wrapAsm";
+import type {Yoga} from './wrapAsm';
 
-export * from "./generated/YGEnums";
-export * from "./wrapAsm";
+export * from './generated/YGEnums';
+export * from './wrapAsm';
 
 export function loadYoga(): Promise<Yoga>;