1.2.1

This release contains breaking changes

• [BREAKING] System and request logging has been split up. System logging no longer uses csv. Request logs are now written to requests_log_path.
• [BREAKING] The verbosity configuration has been replaced with log_level:

  # "debug" - All events are written to the log
  # "info" - Informational and higher events are written to the log
  # "warn" - Warning and higher events are written to the log
  # "error" - Only error events are written to the log
  log_level = warn