Use cliver from github for tests

[route]

No description provided.

[zw963]

Hi, do you consider remove cliver gem? anyway, this gem never update since 7 years ago, and i search code on ferrum,

ferrum/browser/options/base.rb:31:              path = Cliver.detect(name) and break(path)
ferrum/browser/command.rb:32:        raise Cliver::Dependency::NotFound.new(NOT_FOUND) unless @path
ferrum/browser/xvfb.rb:14:        Cliver.detect("Xvfb")
ferrum/browser/xvfb.rb:21:        raise Cliver::Dependency::NotFound.new(NOT_FOUND) unless @path

is there some special use case for must use cliver gem resolve this?

[zw963]

BTW: when run test on it, i get following warning too.

gems/cliver-0.3.2/lib/core_ext/file.rb:15: warning: method redefined; discarding old absolute_path?

[route]

@zw963 Yes I think we can remove it, though we need to first write a simple replacement.