Use top constants in manifest

Author: keeshux

Package.swift

@@ -3,6 +3,10 @@
 
 import PackageDescription
 
+let filename = "openssl.xcframework.zip"
+let version = "3.2.108"
+let checksum = "3b42bf3d19a113f9b3d38def711ec693c6be65683afba13f94eec4ad4fee5b67"
+
 let package = Package(
     name: "openssl-apple",
     products: [
@@ -15,8 +19,9 @@ let package = Package(
     targets: [
         .binaryTarget(
             name: "openssl",
-            url: "https://github.com/passepartoutvpn/openssl-apple/releases/download/3.2.108/openssl.xcframework.zip",
-            checksum: "3b42bf3d19a113f9b3d38def711ec693c6be65683afba13f94eec4ad4fee5b67"),
+            url: "https://github.com/passepartoutvpn/openssl-apple/releases/download/\(version)/\(filename)",
+            checksum: checksum
+        ),
 
         // local development
 //        .binaryTarget(