Description of changes:
Update to support ROS2 Foxy. create_publisher was only one function that needed an update, as there has been a new required parameter added to it.
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Issue #, if available:
Description of changes: Update to support ROS2 Foxy. create_publisher was only one function that needed an update, as there has been a new required parameter added to it.
By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.