ROS2 Humble devel (#23)

* change to Humble CI

* update lifecycle api for humble

* re-arrange headers per cpplint

* increment version number and update changelog

modifying pacmod3 ros2 driver to work with pacmod2 (#22)

* modifying pacmod3 ros2 driver to work with pacmod2

* delete unused code, increment version number, change pub_thread_ to unique_ptr

* remove accidentally added namespace

* foxy update

* fix cpplint stuff

* fix uncrustify stuff

* add CONTRIBUTING.md

3.0.0 Release (#21)

* Update changelog for 3.0.0 release

* 3.0.0

Adding changelog and bumping version for ROS release.

Adding changelog and bumping version for ROS release.

Moving DBC to root.

Changed 'overridden' to 'override_active' (name was changed in Global…

…MsgRpt)

Missing remaps for socketcan.

Cleaning up launch file.