Could not find class ::concat::setup

[asurinsaka]

In the home page of puppetlabs/concat, it says that:
The following functionality existed in previous versions of the concat module, but was removed in version 2.0.0:
...
The concat::setup class has also been removed.

[igalic]

@asurinsaka sorry for letting this slip through the cracks.
would you like to try and patch this?