Log Message:
devel/ruby-console: update to 1.18.0

1.17.3 (2023-07-19)

Reduce serialized subject to simple string field. (#41)

* Only log subject class name.
* Follow similar formatting rules for subject as we do for the terminal
  logger.

1.17.4 (2023-07-19)

* Remove class as it is already part of subject. (#42)

1.18.0 (2023-07-21)

Fix behaviour of CONSOLE_ON and CONSOLE_OFF. (#43)

* Remove unused `enabled:` option.
* Add more tests for Filter.

Introduce null log output.