FFI rzmq 1.0 has been released. we should use it.

I have the need to use ffi-rzmq >= 1.0.

I have updated the dependencies of em-zeromq.

Tests pass and I am running my apps with 

Can you please release a new version of the gem?

I have also relaxed the dependencies.

It's really cumbersome to build a new gem every time a new ffi-rzmq gem is released.

Maybe I overshot the mark with '>= 1.0.0' and it should be '~> 1.0.0'.

But fixing the exact version is really horrible.