2.3.7

What's Changed

• Switch to "use_fake_hardware" for UR20 (backport #950) by @mergify in #962
• Fix multi-line strings in DeclareLaunchArgument (backport #948) by @mergify in #969
• Update installation instructions for source build (backport #967) by @mergify in #971
• Reduce number of controller_spawners to 3 (backport #919) by @mergify in #929
• Simplify tests (backport #849) by @mergify in #868
• Remove dependency to docker.io (backport #985) by @mergify in #988
• [GPIO Controller] Use latched publishing for robot_mode and safety_mode (backport #978) by @mergify in #992

Full Changelog: 2.3.6...2.3.7