Log Message:
graphics/ruby-RMagick: update to 4.2.4

4.2.4 (2021-12-27)

Improvements

* spec_helper: drop require_relative to lib directory (#1306)
* Fix build error with Ruby 3.1 on macOS (#1313)

Bug Fixes

* remove Mutex in trace_proc= (#1303)
* channel_mean_spec: fix floating point comparison (#1307)
* changed_predicate_spec: ensure target directory exists (#1305)
* Doc: Fix documentation of Magick::Image#crop (#1311)
* Magick::UndefinedKernel should also not be used when creating a new
  KernelInfo. (#1312)