fix: Expose library product in Swift Package Manager

Fixes #55

Author: kylef

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Commander Changelog
 
+## Master
+
+### Bug Fixes
+
+- The Swift Package now contains the Commander library product.
+
 ## 0.7.0
 
 Switches to Swift 4.0.

Package.swift

@@ -4,6 +4,9 @@ import PackageDescription
 
 let package = Package(
   name: "Commander",
+  products: [
+    .library(name: "Commander", targets: ["Commander"]),
+  ],
   dependencies: [
     .package(url: "https://github.com/kylef/Spectre.git", from: "0.8.0"),
   ],