Make the package compatible with composer 2.x

[christianlupus]

Currently the make call during travis build causes the warning

Deprecation warning: Your package name Cookbook is invalid, it should have a vendor name, a forward slash, and a package name. The vendor and package name can be words separated by -, . or _. The complete name should match "^[a-z0-9]([_.-]?[a-z0-9]+)*/[a-z0-9](([_.]?|-{0,2})[a-z0-9]+)*$". Make sure you fix this as Composer 2.0 will error.

As stated, this should be update in the near future to avoid problems once travis switches to a more recent composer version.