Tests

Update API from slack-api-ref@1ee282e (2025-05-08) #1600

Job	Run time
test (ruby=2.7, concurrency=async-websocket)	34s
test (ruby=2.7)	39s
test (ruby=3.0)	20s
test (ruby=3.1)	23s
test (ruby=3.2)	21s
test (ruby=3.4)	21s
test (ruby=ruby-head)	22s
test (ruby=3.3)	25s
test (ruby=jruby-head)	2m 41s
coveralls	3s
	6m 9s

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