upgrade yoga-layout

Summary:
- upgraded to yoga-layout@1.9.3
- set default values correctly
- catch errors

Reviewed By: emilsjolander

Differential Revision: D7001154

fbshipit-source-id: 49527576c61ce109ba0af0f50c981cf5c2c7d41a

website/src/components/Playground/PositionRecord.js

@@ -14,17 +14,17 @@ import {Record} from 'immutable';
 import type {RecordOf} from 'immutable';
 
 export type PositionRecordT = RecordOf<{
-  top: string,
-  right: string,
-  bottom: string,
-  left: string,
+  top: string | number,
+  right: string | number,
+  bottom: string | number,
+  left: string | number,
 }>;
 
 const r: PositionRecordT = Record({
-  top: '',
-  right: '',
-  bottom: '',
-  left: '',
+  top: 0,
+  right: 0,
+  bottom: 0,
+  left: 0,
 });
 
 export default r;