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Upgrade `reline` to `0.4` and add custom color scheme to `RubyShell` #172

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Run time

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Job	Run time
rubocop	16s
Ruby 3.0	13s
Ruby 3.1	12s
Ruby 3.2	14s
Ruby 3.3	8s
Ruby jruby	47s
Ruby truffleruby	28s
	2m 18s