v0.2.0

Added

• A dedicted CHANGLOG.md to track the changes of the package.
• CI Intergration of Github Action
• [spatial] Added Polygon representation and calculate intersections between it and ray or lines.
• [ros] Convertion between geometry_msgs/Point and numpy.
• [ros] Added ac_wait_for_server_wrapper that wraps actionlib's simple wait_for_server command and let us know if its waiting.

Changed

• Migrated some test from unittest to pytest.
• Cleaned up formating in some sub packages.