RSpec

Bump regexp_parser from 2.8.2 to 2.8.3 #720

Job	Run time
Ruby 3.0 and ActiveSupport 6.1	58s
Ruby 3.0 and ActiveSupport 7.0	30s
Ruby 3.0 and ActiveSupport 7.1	34s
Ruby 3.0 and ActiveSupport main	58s
Ruby 3.1 and ActiveSupport 6.1	31s
Ruby 3.1 and ActiveSupport 7.0	26s
Ruby 3.1 and ActiveSupport 7.1	31s
Ruby 3.1 and ActiveSupport main	4m 15s
Ruby 3.2 and ActiveSupport 6.1	31s
Ruby 3.2 and ActiveSupport 7.0	27s
Ruby 3.2 and ActiveSupport 7.1	27s
Ruby 3.2 and ActiveSupport main	29s
Ruby head and ActiveSupport 6.1	37s
Ruby head and ActiveSupport 7.0	31s
Ruby head and ActiveSupport 7.1	30s
Ruby head and ActiveSupport main	32s
	12m 47s

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