Add forceSync for better behavior control

Author: StevenSorial

Sources/Defaults+Syncing.swift

@@ -36,6 +36,10 @@ public extension DefaultsAdapter {
         syncer.syncedKeys.subtract(rawKeys)
     }
 
+    func forceSync() {
+        syncer.forceSync()
+    }
+
     func stopSyncingAll() {
         syncer.syncedKeys = []
     }

Sources/DefaultsSyncer.swift

@@ -29,9 +29,7 @@ internal class DefaultsSyncer {
 
     let defaults: UserDefaults
 
-    var syncedKeys = Set<String>() {
-        didSet { iCloudDefaultsDidUpdate() }
-    }
+    var syncedKeys = Set<String>()
 
     init(defaults: UserDefaults) {
         self.defaults = defaults
@@ -43,6 +41,11 @@ internal class DefaultsSyncer {
                                                    name: UserDefaults.didChangeNotification)
     }
 
+    internal func forceSync() {
+        iCloudDefaultsDidUpdate()
+        localDefaultsDidUpdate()
+    }
+
     @objc
     private func iCloudDefaultsDidUpdate() {
         guard !syncedKeys.isEmpty else { return }