Bug#944906: gitlab fails to install with missing rubyzip dependency

[Pirate Praveen]

Package: gitlab

Severity: grave
version: 12.2.9-2


Could not find gem 'rubyzip (>= 1.2.2, ~> 1.2)' in any of the gem 
sources listed in your Gemfile.


All tests pass with rubyzip 2.0 
<https://gitlab.com/utkarsh2102/gitlab/merge_requests/1> so we can just 
add this patch to Gemfile and bump minimum version in control to >= 
2.0~ to force new version in updates.


Though we need only ~> 2.0 instead of ~> 2.0.0 in Gemfile.