Change from direct to group

Hi @shageman 

_Disclaimer: This is more a discussion than a PR_ :wink: 

When used __direct: true__ on Gemfile to declare wrapper direct dependencies, I got this error:

```ruby
gem 'my_component', path: 'components/my_component', direct: true
```

```
You passed :direct as an option for gem 'organization', but it is invalid. Valid options are: group, groups, git,
path, name, branch, ref, tag, require, submodules, platform, platforms, type
```

To understand what I was doing wrong I tried a possible solution, so I used a possible option on Gemfile to declare the dependency

Declared the Gemfile as:

```ruby
gem 'my_component', path: 'components/my_component', group: :direct
```

As "group" is a valid option on Gemfile and :direct is not a usual group

So I'm sending this PR without any intention to be merged, just to explain what is happening here.

Thank you