Use last element in args tuple as error message

When things blow up in low-level C code, the tuple is sometimes of
length one, such as when it contains this error message:

    _ssl.c:495: The handshake operation timed out

Just use the last element of the tuple, which works for all of the
cases.

Signed-off-by: Dan McGee <dan@archlinux.org>
Bump some requirements

Signed-off-by: Dan McGee <dan@archlinux.org>