• feat: The $wait_for_workers() method can now wait for a specific number of workers or a specific set of worker ids.
  The workers are checked for registration in the network now.

feat: Add $empty_queue() method.
fix: Queued tasks can be moved to failed now.

feat: change default of n_workers

• feat: Output and message logs can be written to files now via the message_log and output_log arguments.
• compatibility: lgr 0.5.0
• BREAKING CHANGE: The mlr3 ecosystem has a base logger now which is named mlr3.
  The mlr3/rush logger is a child of the mlr3 logger and is used for logging messages from the rush package.

• feat: Add $reconnect() method.

• fix: Rush class was not exported.
• fix: R6 package was not imported.

• Initial CRAN submission.