fixes #535 - changes unneeded js require expression to a static strin…

Summary:
fixes #535 - changes unneeded js require expression to a static string to clean up webpack warnings
Closes https://github.com/facebook/yoga/pull/536

Differential Revision: D4977993

Pulled By: emilsjolander

fbshipit-source-id: 92fe3a278391f37e44ac816d662885df6b4ea11f

javascript/sources/entry-common.js

@@ -23,7 +23,7 @@ module.exports = function (bind, lib) {
 
         UNDEFINED: NaN
 
-    }, require(`./YGEnums`));
+    }, require('./YGEnums'));
 
     class Layout {