A few things:
- One feature eligibility test was incorrect, namely
`test_givenFreeVersion_thenIsNotEligibleForAnyFeature`
- Eligibility tests of feature subsets must also assert ineligibility of
excluded features
- App type was not covered
Also add and test a new .fullVersionPlusTV app type including the
.appleTV feature.
Carefully drop the StoreKit and Kvitto dependencies for ProductManager
to be testable.
Rebuild test target completely to start writing meaningful tests in
general.
Davide De Rosa