Add family (mac, ipad, etc) to the product model.
Bump version to v0.7.0.
Not every store supports every product family.
We might end up in a situation where “watches”
supported by the library, but they are available
for sale in the US store, but not in the IT one.
For this case, we add a new ProductNotFoundError
exception.
What's Changed
* Add product family by zmoog in https://github.com/zmoog/refurbished/pull/60
**Full Changelog**: https://github.com/zmoog/refurbished/compare/v0.6.0...v0.7.0