RubyZip 3.0 Upgrade

Need to check that we're not using any of these:

RubyZip 3.0 is coming!

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The public API of some Rubyzip classes has been modernized to use named parameters for optional arguments. Please check your usage of the following classes:

• Zip::File
• Zip::Entry
• Zip::InputStream
• Zip::OutputStream

Please ensure that your Gemfiles and .gemspecs are suitably restrictive to avoid an unexpected breakage when 3.0 is released (e.g. ~> 2.3.0). See https://github.com/rubyzip/rubyzip for details. The Changelog also lists other enhancements and bugfixes that have been implemented since version 2.3.0.