Add specs for the deprecated Data class
user
```ruby
require_relative '../../spec_helper'

describe "Data" do
  it "is a subclass of Object" do
    suppress_warning do
      Data.superclass.should == Object
    end
  end

  ruby_version_is "2.5" do
    it "is deprecated" do
      -> { Data }.should complain(/constant ::Data is deprecated/)
    end
  end
end
```
assistant