match package number to currently released version (#83)

Signed-off-by: ijnek <kenjibrameld@gmail.com>

Author: ijnek

dynamixel_hardware/package.xml

@@ -2,7 +2,7 @@
 <?xml-model href="http://download.ros.org/schema/package_format3.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
 <package format="3">
   <name>dynamixel_hardware</name>
-  <version>0.0.0</version>
+  <version>0.3.1</version>
   <description>ros2_control hardware for ROBOTIS Dynamixel</description>
   <maintainer email="yutaka.kondo@youtalk.jp">Yutaka Kondo</maintainer>
   <license>Apache 2.0</license>