The workaround for rosbridge_library was to include the pure Python
implementation of the cbor package in rosbridge_library. Using the
system package with its native extensions makes encoding binary
arrays roughly twice as fast, so we install it here as a workaround
for the workaround.
rosbridge_library does not depend on this package because it is not available on Fedora: https://github.com/RobotWebTools/rosbridge_suite/issues/375
The workaround for rosbridge_library was to include the pure Python implementation of the cbor package in rosbridge_library. Using the system package with its native extensions makes encoding binary arrays roughly twice as fast, so we install it here as a workaround for the workaround.