Update the README for Dashing Patch Release 4

Fix #None

Author: Minggang Wang

README.md

@@ -11,6 +11,7 @@ If you want to select a stable release of ROS 2.0 as your platform, please check
 
 ROS 2.0 release | NPM version |
 :------------: |  :-------------: |
+Dashing Diademata Patch Release [4](https://github.com/ros2/ros2/releases/tag/release-dashing-20191018) | [0.10.3](https://github.com/RobotWebTools/rclnodejs/releases/tag/0.10.3) |
 Dashing Diademata Patch Release [3](https://github.com/ros2/ros2/releases/tag/release-dashing-20190910) | [0.10.2](https://github.com/RobotWebTools/rclnodejs/releases/tag/0.10.2) |
 Dashing Diademata Patch Release [2](https://github.com/ros2/ros2/releases/tag/release-dashing-20190806) | [0.10.1](https://github.com/RobotWebTools/rclnodejs/releases/tag/0.10.1) |
 Dashing Diademata Patch Release [1](https://github.com/ros2/ros2/releases/tag/release-dashing-20190614) | [0.10.0](https://www.npmjs.com/package/rclnodejs/v/0.10.0) |