feat: add CocoaPods support (#5)

Author: ameter

AmplifyUtilsNotifications.podspec

@@ -0,0 +1,28 @@
+Pod::Spec.new do |spec|
+
+  spec.name          = "AmplifyUtilsNotifications"
+  spec.version       = "0.0.2"
+  spec.summary       = "AWS Amplify Swift Utilities for Notifications."
+
+  spec.description   = "<<-DESC
+  Amplify Swift Utilities for Notifications provides helpful functionality for working with push notifications on iOS and macOS.
+  Although it was developed for use with AWS Amplify, it can also be used indepdendently.
+
+  The following features are provided:
+    * Service extension to support fetching and attaching remote media to notifications
+    * Convenience methods to support requesting notification permissions and registering with APNs
+  DESC"
+
+  spec.homepage      = "https://github.com/aws-amplify/amplify-swift-utils-notifications"
+  spec.license       = "Apache License, Version 2.0"
+  spec.author        = { "Amazon Web Services" => "amazonwebservices" }
+
+  spec.ios.deployment_target = "13.0"
+  spec.osx.deployment_target = "10.15"
+  spec.swift_version = "5.6"
+
+  spec.source        = { :git => "https://github.com/aws-amplify/amplify-swift-utils-notifications.git", :tag => "#{spec.version}" }
+
+  spec.source_files  = "Sources/AmplifyUtilsNotifications/**/*.swift"
+
+end

Sources/AmplifyUtilsNotifications/AUNotificationPermissions.swift

@@ -16,6 +16,11 @@ import UIKit
 typealias Application = UIApplication
 #endif
 
+@available(iOSApplicationExtension, unavailable)
+@available(watchOSApplicationExtension, unavailable)
+@available(tvOSApplicationExtension, unavailable)
+@available(macCatalystApplicationExtension, unavailable)
+@available(OSXApplicationExtension, unavailable)
 /// Provides convenience methods for requesting and checking notifications permissions.
 public class AUNotificationPermissions {