Add platforms

Author: uhooi

Package.swift

@@ -1,23 +1,23 @@
 // swift-tools-version:5.3
-// The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
 let package = Package(
     name: "HTTPClient",
+    platforms: [
+        .iOS(.v8),
+        .macOS(.v10_10),
+        .tvOS(.v9),
+        .watchOS(.v2),
+    ],
     products: [
-        // Products define the executables and libraries a package produces, and make them visible to other packages.
         .library(
             name: "HTTPClient",
             targets: ["HTTPClient"]),
     ],
     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 this package depends on.
         .target(
             name: "HTTPClient",
             dependencies: []),