**Added** - feat: add `errSecMissingEntitlement` error [\#224](https://github.com/auth0/SimpleKeychain/pull/224) ([grdsdev](https://github.com/grdsdev)) - Add `Sendable` conformance [\#235](https://github.com/auth0/SimpleKeychain/pull/235) ([Widcket](https://github.com/Widcket))