1.2.2

Bugfixes

only raise "unknown option" error when option is not supported, not anymore when error happens in the setup of a support option.
usage of HTTPX::Session#wrap within a thread with other sessions using the :persistent plugin won't inadvertedly terminate its open connections.
terminate connections on IOError (SocketError does not cover them).
terminate connections on HTTP/2 protocol and handshake errors, which happen during establishment or termination of a HTTP/2 connection (they were being previously kept around, although they'd irrecoverable).
:oauth plugin: fixing check preventing the OAuth metadata server integration path to be exercised.
fix instantiation of the options headers object with the wrong headers class.