Bump package version

package.xml

 <?xml version="1.0" ?>
 <package format="2">
   <name>ping360_sonar</name>
-  <version>1.2.5</version>
+  <version>1.2.8</version> 
   <description>A ROS package for Blue Robotics Ping360 Sonar</description>
 
   <url type="website">http://wiki.ros.org/ping360_sonar</url>