* [#541] Adopt Latest main commit of SDK
This adopts commit `cf60f44aa83938432c81361917406483ff42c719` from `main`
branch of ZcashLightClientKit.
It includes changes to remove a fake "defaultBirthday" and use the real
`BlockHeight.ofLatestCheckpoint()` function that allows the wallets
to fetch the latest checkpoint available from bundle and define it as the
birthday. Also "defaultBirthday" birthday was incorrectly being used as a
replacement for Sapling Activation height which is the minimum birthday
supported by the wallet in terms of shielded pools.
Wallets with lower heights that have only transparent funds could in theory
work, but they won't be able to see sprout funds. Also the the SDK won't provide a birthday prior to sapling activation.
removes references to `LightWalletService` since this class has been made
internal to the SDK only.
adopts FsBlockDb and adds a FsBlockDbRoot directory dependency for the
Databases dependencies. Which should be renamed in a later commit
Closes#541
* Fix SwiftLint issues
Francisco Gindre
Lukas Korba