Add libyear support

[amkisko]

Hey!

There is a tool that falls under codeclimate domain fully called libyear, the libyear metric can be introduced per language and will be quite useful for keeping the dependencies fresh by following this metric.

References:

• https://libyear.com

A simple measure of software dependency freshness. It is a single number telling you how up-to-date your dependencies are.

• https://github.com/search?q=libyear&type=repositories