Updated package.xml version from v0.0.6 to v0.0.8

This was done to enable a succesfull catkin build.

Author: rickstaa

package.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <package>
   <name>perception</name>
-  <version>0.0.6</version>
+  <version>0.0.8</version>
   <description>The perception package</description>
 
   <!-- One maintainer tag required, multiple allowed, one person per tag -->