Tests

Update API from slack-api-ref@3ec3c10 (2025-02-05) #1375

Job	Run time
test (ruby=2.7)	35s
test (ruby=2.7, concurrency=async-websocket)	33s
test (ruby=3.0)	20s
test (ruby=3.1)	27s
test (ruby=3.2)	26s
test (ruby=3.3)	24s
test (ruby=ruby-head)	22s
test (ruby=jruby-head)	2m 10s
coveralls	2s
	5m 19s

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