Rubyzip dependency version

[ValentinSoyer]

Hi,

First thank you for your gem, it is very helpful ;)

Is that possible to update the version of rubyzip dependency in your .gemspec file in a new version of your gem ? That would be great ! 1.x is old, and create some troubles with other gems that require rubyzip with later versions. In that case, we must downgrade the version of rubyzip.

Thank you.