Tests

Require Faraday 2.0.1 or greater (#554) #1652

Job	Run time
test (ruby=2.7)	35s
test (ruby=3.0)	25s
test (ruby=2.7, concurrency=async-websocket)	39s
test (ruby=3.1)	22s
test (ruby=3.3)	30s
test (ruby=3.2)	23s
test (ruby=jruby-head)	2m 36s
test (ruby=ruby-head)	16s
test (ruby=3.4)	22s
coveralls	6s
	6m 14s

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