Bumping cairo requirement for 2.18 from 1.3.12 to 1.3.14

[Behdad Esfahbod <behdad behdad org>]

Thought this is automatic.  Anyway, please bump.  1.3.14 has been out
for a couple of weeks now...

1.4.0 will be out really soon now.  Blockers are being fixed at a rate
of 2 or 3 a day, and only 4 or 5 are remaining.

-- 
behdad
http://behdad.org/

"Those who would give up Essential Liberty to purchase a little
 Temporary Safety, deserve neither Liberty nor Safety."
        -- Benjamin Franklin, 1759