Tests

Update API from slack-api-ref@1ee282e (2025-05-10) #1604

Job	Run time
test (ruby=2.7, concurrency=async-websocket)	34s
test (ruby=2.7)	33s
test (ruby=3.4)	20s
test (ruby=3.1)	21s
test (ruby=3.3)	23s
test (ruby=3.0)	21s
test (ruby=3.2)	20s
test (ruby=jruby-head)	2m 39s
test (ruby=ruby-head)	21s
coveralls	6s
	5m 58s

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