Modernize the `active_support` requires #206

Job	Run time
rubocop	20s
docs	20s
matrix-test (3.1)	19s
test	28s
matrix-test (3.2)	21s
matrix-test (3.3)	24s
matrix-test (jruby-9.3.10)	58s
matrix-test (jruby)	1m 7s
matrix-test (head, true)	1m 11s
matrix-test (jruby-head, true)	1m 33s
matrix-test (truffleruby-head, true)	1m 50s
coverage-check	9s
required-checks	1s
	9m 1s

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