Convert react-native-github/Libraries to let/const

Reviewed By: sahrens

Differential Revision: D7956042

fbshipit-source-id: 221851aa311f3cdd6326497352b366048db0a1bb

Author: elicwhite

Libraries/ART/ARTSerializablePath.js

@@ -9,16 +9,16 @@
 
 // TODO: Move this into an ART mode called "serialized" or something
 
-var Class = require('art/core/class.js');
-var Path = require('art/core/path.js');
+const Class = require('art/core/class.js');
+const Path = require('art/core/path.js');
 
-var MOVE_TO = 0;
-var CLOSE = 1;
-var LINE_TO = 2;
-var CURVE_TO = 3;
-var ARC = 4;
+const MOVE_TO = 0;
+const CLOSE = 1;
+const LINE_TO = 2;
+const CURVE_TO = 3;
+const ARC = 4;
 
-var SerializablePath = Class(Path, {
+const SerializablePath = Class(Path, {
 
   initialize: function(path) {
     this.reset();