Add support for IO#timeout. (#714) #951

Job	Run time
openssl-1.0.2u	2m 28s
openssl-1.1.0l	1m 30s
openssl-1.1.1w	2m 18s
openssl-3.0.12	2m 48s
openssl-3.1.4	2m 54s
openssl-3.2.0	3m 30s
libressl-3.1.5	2m 5s
libressl-3.2.7	2m 21s
libressl-3.3.6	2m 19s
libressl-3.4.3	2m 16s
libressl-3.5.3	2m 17s
libressl-3.6.3	2m 19s
libressl-3.7.3	2m 15s
libressl-3.8.1	2m 13s
openssl-3.0.12 fips	2m 42s
openssl-3.1.4 fips	2m 50s
openssl-3.2.0 fips	3m 39s
openssl-head	3m 30s
openssl-head fips	3m 21s
ruby-versions / Generate Ruby versions	2s
ubuntu-22.04 2.7	57s
ubuntu-22.04 3.0	54s
ubuntu-22.04 3.1	1m 1s
ubuntu-22.04 3.2	58s
ubuntu-22.04 3.3	57s
ubuntu-22.04 head	55s
ubuntu-22.04 truffleruby	1m 33s
ubuntu-22.04 truffleruby-head	1m 31s
ubuntu-20.04 2.7	53s
ubuntu-20.04 3.0	51s
ubuntu-20.04 3.1	53s
ubuntu-20.04 3.2	54s
ubuntu-20.04 3.3	47s
ubuntu-20.04 head	47s
ubuntu-20.04 truffleruby-head	1m 22s
macos-latest 2.7	1m 52s
macos-latest 3.0	1m 3s
macos-latest 3.1	1m 27s
macos-latest 3.2	1m 6s
macos-latest 3.3	59s
macos-latest head	1m 14s
macos-latest truffleruby-head	2m 57s
windows-latest 2.7	4m 50s
windows-latest 3.0	4m 22s
windows-latest 3.1	4m 34s
windows-latest 3.2	5m 3s
windows-latest 3.3	5m 48s
windows-latest ucrt	4m 2s
windows-latest mswin	3m 35s
	1h 47m 42s

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