Update BitcoinDevKit.swift and Package.swift for release 0.27.1

Author: runner

Package.swift

@@ -24,8 +24,8 @@ let package = Package(
         // Targets can depend on other targets in this package, and on products in packages this package depends on.
         .binaryTarget(
             name: "bdkFFI",
-            url: "https://github.com/bitcoindevkit/bdk-swift/releases/download/0.26.0/bdkFFI.xcframework.zip",
-            checksum: "3e73dc3f82207ffde9f4894abfca4fd96ca876857aab883f998b91595ae39d0f"),
+            url: "https://github.com/bitcoindevkit/bdk-swift/releases/download/0.27.1/bdkFFI.xcframework.zip",
+            checksum: "639f38c8ae3b8949abe2292baec96af565205e08fbadcd0992aa2923f275e190"),
         .target(
             name: "BitcoinDevKit",
             dependencies: ["bdkFFI"]),