Set up macOS example

Examples/ImagesExample-macOS/Package.resolved

@@ -0,0 +1,8 @@
+{
+  "object": {
+    "pins": [
+
+    ]
+  },
+  "version": 1
+}

Examples/ImagesExample-macOS/Package.swift

@@ -12,7 +12,7 @@ let package = Package(
             targets: ["ImagesExample-macOS"]),
     ],
     dependencies: [
-        .package(url: "../../PlaceholderKit", from: "0.0.3")
+        .package(path: "../../.")
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
@@ -22,6 +22,6 @@ let package = Package(
             dependencies: ["PlaceholderKit"]),
         .testTarget(
             name: "ImagesExample-macOSTests",
-            dependencies: ["ImagesExample-macOS", "PlaceholderKit"]),
+            dependencies: ["ImagesExample-macOS"]),
     ]
 )

Examples/ImagesExample-macOS/Sources/ImagesExample-macOS/ImagesExample_macOS.swift

@@ -1,3 +0,0 @@
-struct ImagesExample_macOS {
-    var text = "Hello, World!"
-}

Examples/ImagesExample-macOS/Sources/ImagesExample-macOS/main.swift

@@ -0,0 +1,12 @@
+//
+//  main.swift
+//  ImagesExample-macOS
+//
+//  Created by Simon Lee on 12/26/18.
+//
+import PlaceholderKit
+import AppKit
+
+let image = PlaceholderBuilder().coloredBackground(color: .red, size: CGSize(width: 100, height: 100))
+
+print(image)