A snip721 implementation which can be migrated. It can be used on its own and managed by a user's wallet or it can be instantiated by the example snip721-dealer or some other contract.
A minimal contract which allows anyone to buy a mint of an nft with fixed metadata. It instantiates its own snip721-migratable instance. And registers itself as a minter
Both contracts can be migrated without breaking their references to each other. When snip721-dealer migrates it will automatically notify its snip721-migratable instance to update its minters list.
And when snip721-migratable migrates it automatically notifies the dealer to update its reference to the new snip721-migratable address