update version to 0.4.0 (#69)

Author: peifeng-unity

CHANGELOG.md

@@ -18,4 +18,30 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 ### Removed
 
+### Fixed
+
+## [0.4.0] - 2021-05-27
+
+Note: the logs only reflects the changes from version 0.3.0
+
+### Upgrade Notes
+
+RosConnection 2.0: maintain a single constant connection from Unity to the Endpoint. This is more efficient than opening one connection per message, and it eliminates a whole bunch of user issues caused by ROS being unable to connect to Unity due to firewalls, proxies, etc.
+
+### Known Issues
+
+### Added
+
+Add a link to the Robotics forum, and add a config.yml to add a link in the Github Issues page
+
+Add linter, unit tests, and test coverage reporting
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+Remove outdated handshake references
+
 ### Fixed

package.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <package format="2">
   <name>ros_tcp_endpoint</name>
-  <version>0.3.0</version>
+  <version>0.4.0</version>
   <description>Acts as the bridge between Unity messages sent via Websocket and ROS messages.</description>
 
   <maintainer email="unity-robotics@unity3d.com">Unity Robotics</maintainer>