Exclude NestedBatchUpdates from watchOS

Author: tonyarnold

Differ.podspec

@@ -19,10 +19,20 @@ Also included are utilities for easily applying diffs and patches to `UICollecti
   s.source = { :git => "https://github.com/tonyarnold/Differ.git", :tag => "1.1.1" }
   s.source_files = "Sources/Differ"
 
-  s.platforms = { :ios => "8.0", :osx => "10.10", :tvos => "9.0", :watchos => "3.0" }
+  s.platforms = { :ios => "8.0", :osx => "10.11", :tvos => "9.0", :watchos => "3.0" }
   s.pod_target_xcconfig = { 'SWIFT_VERSION' => '4.1' }
-  s.ios.exclude_files = ["Sources/Differ/Diff+AppKit.swift"]
-  s.osx.exclude_files = ["Sources/Differ/Diff+UIKit.swift"]
-  s.tvos.exclude_files = ["Sources/Differ/Diff+AppKit.swift"]
-  s.watchos.exclude_files = ["Sources/Differ/Diff+UIKit.swift", "Sources/Differ/Diff+AppKit.swift"]
+  s.ios.exclude_files = [
+    "Sources/Differ/Diff+AppKit.swift"
+  ]
+  s.osx.exclude_files = [
+    "Sources/Differ/Diff+UIKit.swift"
+  ]
+  s.tvos.exclude_files = [
+    "Sources/Differ/Diff+AppKit.swift"
+  ]
+  s.watchos.exclude_files = [
+    "Sources/Differ/Diff+UIKit.swift",
+    "Sources/Differ/Diff+AppKit.swift",
+    "Sources/Differ/NestedBatchUpdate.swift"
+  ]
 end

Sources/Differ/Diff+UIKit.swift

@@ -1,4 +1,4 @@
-#if canImport(UIKit)
+#if canImport(UIKit) && !os(watchOS)
 import UIKit
 
 extension BatchUpdate {

Sources/Differ/NestedBatchUpdate.swift

@@ -1,6 +1,7 @@
 //
 //  Copyright © 2018 wczekalski. All rights reserved.
 
+#if !os(watchOS)
 import Foundation
 
 struct NestedBatchUpdate {
@@ -48,3 +49,6 @@ struct NestedBatchUpdate {
         self.sectionDeletions = sectionDeletions
     }
 }
+
+#endif
+