Tests

Require Faraday 2.0.1 or greater (#554) #1654

Job	Run time
test (ruby=2.7)	33s
test (ruby=3.0)	23s
test (ruby=3.4)	20s
test (ruby=2.7, concurrency=async-websocket)	35s
test (ruby=3.2)	24s
test (ruby=3.1)	27s
test (ruby=ruby-head)	18s
test (ruby=3.3)	24s
test (ruby=jruby-head)	2m 36s
coveralls	4s
	6m 4s

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