Bump ABI version 2.1.0 --> 2.2.0
Bump ABI version 2.1.0 --> 2.2.0

New eventfd() API added.

Signed-off-by: Joachim Nilsson <583c295fd7602c168ad814279bbc3894ba65f5d6@gmail.com>

troglobit/libuev,troglobit/libuev