Add dependency on openssl #1

Job	Run time
minimal (ubuntu, jruby)	40s
psych4 (ubuntu, 3.0)	1m 3s
platforms (ubuntu, 2.6)	1m 26s
platforms (macos, 2.6)	2m 7s
platforms (windows, 2.6)	7m 35s
rubocop	39s
rubies (ubuntu, 2.6)	1m 29s
rubies (ubuntu, 2.7)	1m 11s
rubies (ubuntu, 3.0)	1m 11s
rubies (ubuntu, 3.1)	19s
rubies (ubuntu, 3.2)	20s
rubies (ubuntu, ruby-head)	16s
rubies (ubuntu, debug)	26s
rubies (ubuntu, truffleruby)	44s
rubies (ubuntu, truffleruby-head)	56s
	20m 22s

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