[chef] Omnibus 2.0.0!

[Seth Vargo < >]

Ohai Chefs,

I've just released Omnibus (2.0.0) with the following changes:

Major changes:

• version is now default_version
• Added support for multiple software versions and version overrides
• Added support for project-specific overrides
• Added Mac .pkg packaging functionality (DMG coming soon)
• Require Mixlib::Config 2.0

Minor changes:

• Added a new CI pipeline on Travis
• Switch to Ruby 1.9 hash syntaxes

Tiny changes that probably won't affect you:

• .yardopts are no longer committed
• .rspec is no longer committed
• Updated copyrights to new company name
• Improved test coverage
• Miscellaneous bug fixes

Please note that this IS a major version bump and DOES include breaking API changes.

Happy releasing!

Seth

@sethvargo