Tests: unbreak ssl_session_ticket_key.t with old IO::Socket::SSL. Once ssl_session_ticket_key.t was rewritten using IO::Socket::SSL, it requires SSL_session_key and TLSv1.3 session reuse support checks. Although SSL_session_key has been introduced in IO::Socket::SSL 1.965, further improvements appeared in 2.030 are needed for tests to work.