Update BitcoinDevKit.swift and Package.swift for release 0.7.0

Author: runner

Package.swift

@@ -22,11 +22,10 @@ let package = Package(
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
         // 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/0.3.0/bdkFFI.xcframework.zip",
-//            checksum: "7d4a2fdeb03fb3eff107e45ee3148dd9b67966406c82d6e3c19f653c27180cfd"),
-        .binaryTarget(name: "bdkFFI", path: "./bdkFFI.xcframework"),
+        .binaryTarget(
+            name: "bdkFFI",
+            url: "https://github.com/bitcoindevkit/bdk-swift/releases/download/0.7.0/bdkFFI.xcframework.zip",
+            checksum: "256719615848141ea62d070a9bd6e1bafd5bbfc5fced9da3f23101189a58d79d"),
         .target(
             name: "BitcoinDevKit",
             dependencies: ["bdkFFI"]),