Version 2.9.0

[arun251]

• LDClientManager no longer extends UIApplicationDelegate. The framework is now marked as extension-safe.
• Detect 401 Unauthorized response on flag & event requests, and take the client offline when detected.
• Detect LDEventSource report of 401 Unauthorized response on connection requests, and take the client offline when detected.
• UserNoChangeNotification notification if a flag configuration update resulted in no change.
• LDPollingManager now reads the config set at the time of the startPolling message and configures polling timers accordingly.
• LDRequestManager now reads the config set at the time of the performRequest message to configure the API request.
• updateUser now updates the LDUser anonymous property when using a default user key