fix correctly uncache live activity requests

* The optional cast did not work for this case, the cast always failed.
* Use forced cast as we know the types we are uncaching. However, this could be dangerous and not future proof.
* Swift does not offer a do-try-catch for runtime errors, so we cannot do-try-catch forced casts, unfortunately.

Author: nan-li

iOS_SDK/OneSignalSDK/OneSignalLiveActivities/Source/Executors/OSLiveActivitiesExecutor.swift

@@ -49,7 +49,7 @@ class RequestCache {
         self.cacheKey = cacheKey
         self.ttl = ttl
         self.items = OneSignalUserDefaults.initShared()
-            .getSavedCodeableData(forKey: cacheKey, defaultValue: nil) as? [String: OSLiveActivityRequest] ?? [String: OSLiveActivityRequest]()
+            .getSavedCodeableData(forKey: cacheKey, defaultValue: nil) as! [String: OSLiveActivityRequest]? ?? [String: OSLiveActivityRequest]()
         OneSignalLog.onesignalLog(.LL_VERBOSE, message: "OneSignal.LiveActivities initialized token cache \(self): \(items)")
     }