macOS

Added the latest versions of irb, json and rdoc to NEWS #594

Job	Run time
make (check, macos-14)	6m 37s
make (check, macos-14, --with-gcc=gcc-14)	7m 45s
make (check, macos-14, --with-jemalloc --with-opt-dir=$(brew --prefix jemalloc))	6m 59s
make (check, macos-14, --with-gmp)	5m 47s
make (test-all, --repeat-count=2, macos-14)	8m 43s
make (test-bundler-parallel, macos-14)	18m 57s
make (test-bundled-gems, macos-14)	8m 37s
make (check, macos-15)	6m 46s
make (check, macos-13)	12m 18s
macOS result	1s
	1h 22m 30s

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