Updated Package description

Author: colemancda

Package.swift

@@ -1,5 +1,24 @@
+// swift-tools-version:4.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
 import PackageDescription
 
 let package = Package(
-    name: "HTTP"
+    name: "HTTP",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "HTTP",
+            targets: ["HTTP"]),
+    ],
+    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: "HTTP",
+            dependencies: []),
+        .testTarget(
+            name: "HTTPTests",
+            dependencies: ["HTTP"]),
+    ]
 )