Update test and code quality support for project.
Prefer File.exist? to File.exists? (style).
Remove redundant self (style).
Remove useless exception variable (style).
Prepend underscore for unused block argument names (style).
Prefer `%w[..]` string array syntax (style).
One of those tiny String tweak deals (style).
Swap Berkshelf for Librarian & update cookbook deps.
Update .kitchen.yml.
Pin apt dependency to ~> 2.4.0.
Update ruby installation logic to handle per-user installs.
Fix mac support for ruby-install.
Add support for homebrew cask on mac platform.
Add spec coverage for default and _base recipes.
Remove extra blank lines (style).
Ingore long ruby_block resource (style).