test

Merge pull request #358 from m-nakamura145/update-gemspec #1086

Job	Run time
steep-check (head)	12s
check-misc (head)	11s
test-memory (head)	23s
test-ruby (head, master)	5m 23s
test-ruby (3.0, master)	5m 12s
test-windows (head)	1m 50s
test-ruby (2.7, master)	5m 34s
ruby-versions / Generate Ruby versions	2s
test (2.5)	27s
test (2.6)	26s
test (2.7)	25s
test (3.0)	10s
test (3.1)	11s
test (3.2)	12s
test (3.3)	10s
test (head)	13s
	21m 1s

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