Update version to 0.1.3

Author: GuoGangQuan

src/main/java/seedu/address/MainApp.java

@@ -36,7 +36,7 @@
  */
 public class MainApp extends Application {
 
-    public static final Version VERSION = new Version(0, 2, 2, true);
+    public static final Version VERSION = new Version(0, 1, 3, true);
 
     private static final Logger logger = LogsCenter.getLogger(MainApp.class);