test

Correct doc for peer_cert and add peer_cert_chain #688

Job	Run time
ruby-versions / Generate Ruby versions	5s
test (2.7 / macos-latest)	43s
test (2.7 / ubuntu-latest)	40s
test (3.0 / ubuntu-latest)	25s
test (3.1 / windows-latest)	1m 16s
test (3.0 / macos-latest)	29s
test (3.4 / ubuntu-latest)	25s
test (4.0 / windows-latest)	1m 7s
test (3.2 / macos-latest)	26s
test (3.1 / macos-latest)	30s
test (3.3 / ubuntu-latest)	24s
test (3.0 / windows-latest)	1m 18s
test (head / ubuntu-latest)	25s
test (3.2 / windows-latest)	1m 10s
test (4.0 / ubuntu-latest)	28s
test (3.3 / macos-latest)	26s
test (3.1 / ubuntu-latest)	26s
test (3.2 / ubuntu-latest)	24s
test (head / macos-latest)	28s
test (2.7 / windows-latest)	1m 52s
test (3.4 / windows-latest)	1m 11s
test (4.0 / macos-latest)	23s
test (head / windows-latest)	1m 20s
test (3.3 / windows-latest)	1m 6s
test (3.4 / macos-latest)	28s
	17m 55s

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