Tests

Use secure_compare during signature verification #1531

Job	Run time
test (ruby=2.7, concurrency=async-websocket)	1m 1s
test (ruby=3.0)	43s
test (ruby=2.7)	1m 2s
test (ruby=3.2)	22s
test (ruby=3.4)	48s
test (ruby=jruby-head)	1m 16s
test (ruby=3.3)	44s
test (ruby=3.1)	46s
test (ruby=ruby-head)	47s
coveralls	0s
	7m 29s

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