class RuboCop::Cop::Chef::Deprecations::ChefShellout

Don’t use the deprecated ‘Chef::ShellOut` class which was removed in Chef Infra Client 13. Use the `Mixlib::ShellOut` class instead, which behaves identically or convert to the simpler `shell_out` helper.

@example

### incorrect
include Chef::ShellOut
require 'chef/shellout'
Chef::ShellOut.new('some_command')

### correct
include Mixlib::ShellOut
require 'mixlib/shellout'
Mixlib::ShellOut.new('some_command')