Updating deserialize function (use of ternary operation). Fixes #4696

Author: ronak1009

lib/mixins/property-accessors.html

@@ -344,9 +344,7 @@
             break;
 
           case Date:
-			if(!isNaN(value)){
-				value = Number(value);
-			}
+			value = isNaN(value) ? String(value) : Number(value);
             outValue = new Date(value);
             break;