Add examples project

Examples/Combine using GitHub API/SwiftUI-Combine-Example/AnySubscription.swift

@@ -0,0 +1,15 @@
+import Combine
+
+final class AnySubscription: Subscription {
+    private let cancellable: Cancellable
+
+    init(_ cancel: @escaping () -> Void) {
+        cancellable = AnyCancellable(cancel)
+    }
+
+    func request(_ demand: Subscribers.Demand) {}
+
+    func cancel() {
+        cancellable.cancel()
+    }
+}