release_notes: update release notes for version 1.3.0

Signed-off-by: Ruben Moral <ruben.moral@digi.com>

Author: rubenmoral

release_notes.txt

@@ -1,10 +1,10 @@
                                 XBee Java Library
 
                            Release Notes (PN 93000776)
-                                   Build 1.2.1
-                                 29 August, 2017
+                                   Build 1.3.0
+                                  4 July, 2019
 
-                     Copyright 2017, Digi International Inc.
+                  Copyright 2017-2019, Digi International Inc.
                                http://www.digi.com
 
  Introduction
@@ -14,6 +14,25 @@
  Library, which allows customers to easily develop Java applications 
  that communicate with XBee modules.
 
+ XBee Java Library v1.3.0, July 2019
+--------------------------------------------------------------------------------
+ 1. Changes with respect to previous version:
+     * Added full support for XBee3 modules.
+     * Added new methods to send and receive data from other XBee interfaces
+       through User Data Relay frames.
+     * Removed Android support. This functionality has been moved to a new
+       Android-specific library based on this one, the XBee Library for Android:
+       https://github.com/digidotcom/xbee-android
+     * Added seven examples that demonstrate the new functionality of the API:
+        * Send Bluetooth data example.
+        * Send MicroPython data example.
+        * Send User Data Relay example.
+        * Receive Bluetooth data example.
+        * Receive Bluetooth file example
+        * Receive MicroPython data example.
+        * Receive User Data Relay example.
+     * Minor bug fixes and improvements.
+
  XBee Java Library v1.2.1, August 2017
 --------------------------------------------------------------------------------
  1. Changes with respect to previous version: