urdfdom_py: 0.4.0-0 in 'melodic/distribution.yaml' [bloom]

[clalancette]

Increasing version of package(s) in repository urdfdom_py to 0.4.0-0:

• upstream repository: https://github.com/ros/urdf_parser_py.git
• release repository: https://github.com/ros-gbp/urdfdom_py-release.git
• distro file: melodic/distribution.yaml
• bloom version: 0.6.2
• previous version for package: null

urdfdom_py

* Add Link.visual and Link.collision properties (#28 <https://github.com/ros/urdf_parser_py/issues/28>)
* Add tests for mutli-visual and multi-collision
* links and collisions load properly as aggregates
* Add XPath information when a parse error is encountered
* Remove travis support. (#22 <https://github.com/ros/urdf_parser_py/issues/22>)
* Reformat python code to pep8 standard (#21 <https://github.com/ros/urdf_parser_py/issues/21>)
* Update core.py to allow passing addHeader arg to to_xml_string function (#19 <https://github.com/ros/urdf_parser_py/issues/19>)
* fixed defaults for xyz/rpy, fixed set_default for Param, added unit tests (#16 <https://github.com/ros/urdf_parser_py/issues/16>)
* Make unit test run with catkin_make run_tests (#15 <https://github.com/ros/urdf_parser_py/issues/15>)
* Contributors: Chris Lalancette, Chris Paxton, Eric Cousineau, Shane Loretz, Will Baker, eugene-katsevman