v1.4.0

1.4.0 (2020-06-25)

• Added restrict_to_topics argument to record method of ROSCore, allowing
  users to restrict bag recording to specific topics by supplying a regular
  expression in the same manner as the rosbag command line tool.
• Improved documentation for ROSCore, its associated parts, and messages.
• Added state property to ROSCore along with associated
  SystemState and SystemStateProbe classes.
• Added command property to Parameter, responsible for recording the
  command, if any, that was used to obtain the concrete value for a given
  parameter.
• Added ability to provide node-specific name remappings when using roslaunch
  through the introduction of the remappings argument to the launch
  method.
• Fixed mishandling of complex parameters when reading rosparam tags.
• Added reading and writing of env tags for launch files.
• Added to_xml_string and to_xml_file to LaunchConfig.
• Updated handling of command attributes in param tags during parsing
  of XML launch files: Only the output of stdout is recorded, and stderr
  is now ignored.
• Added handling of $(eval ...) tags in XML launch files.