Tests

Update API from slack-api-ref@3ec3c10 (2025-02-06) #1377

Job	Run time
test (ruby=2.7)	35s
test (ruby=2.7, concurrency=async-websocket)	38s
test (ruby=3.0)	27s
test (ruby=3.1)	29s
test (ruby=3.2)	20s
test (ruby=3.3)	30s
test (ruby=ruby-head)	29s
test (ruby=jruby-head)	2m 5s
coveralls	2s
	5m 35s

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