Tests

Added support for channel and channel_id, do not require channel. #1385

Job	Run time
test (ruby=2.7)	37s
test (ruby=2.7, concurrency=async-websocket)	31s
test (ruby=3.0)	24s
test (ruby=3.1)	20s
test (ruby=3.2)	19s
test (ruby=3.3)	25s
test (ruby=ruby-head)	19s
test (ruby=jruby-head)	1m 51s
coveralls	4s
	4m 50s

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