Updated Swift Package

Package.swift

@@ -3,21 +3,10 @@
 
 import PackageDescription
 
+let name = "secp256k1"
+
 let package = Package(
-    name: "secp256k1",
-    products: [
-        // Products define the executables and libraries produced by a package, and make them visible to other packages.
-        .library(
-            name: "secp256k1",
-            targets: ["secp256k1"]),
-    ],
-    dependencies: [
-        // Dependencies declare other packages that this package depends on.
-        // .package(url: /* package url */, from: "1.0.0"),
-    ],
-    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 which this package depends on.
-        .target(name: "secp256k1", path: "secp256k1")
-    ]
+    name: name,
+    products: [.library( name: name, targets: [name])],
+    targets: [.target(name: name, path: name)]
 )