Add scoping option

[dingo-d]

We should probably add this everywhere in libs (or maybe just here and in boilerplate).

It's a lib to prevent namespace issues in the dependencies.

https://deliciousbrains.com/php-scoper-namespace-composer-depencies/

[MetarDev]

This should definitely be added once we get boilerplate working as a plugin (when it will be a real possibility that a user has a theme and 2-3 plugins installed created using boilerplate, all possibly using different version of https://github.com/infinum/eightshift-libs

[iruzevic]

done