[SDK] [iOS] Release v4.0.0

Changelog:

• This version officially releases in-app messaging!
• Attribute events to the last clicked notification. Lets you view events generated by a particular notification in your dashboard.
• Count delivered notifications and report it to your dashboard.
• Detect devices that no longer receive notifications
• Segment users depending on app usage and real-time presence.
• Reduced logging verbosity
• Added a warning when method swizzling is detected. It's potentially incompatible with WonderPush.setupDelegate(for:)
• Fix spurious "App Open" events tracked on some background activities
• For better privacy, WonderPush no longer collects events from non-subscribers. If you think you have a use-case that would justify collecting data for non-subscribers, please contact us.

Breaking changes:

• Removed isReady: and WP_NOTIFICATION_INITIALIZED NSNotification. You do not need to wait to use WonderPush.
• You must now initialize the SDK using the clientId / clientSecret credentials from the NotificationServiceExtension .

Upgrading:

Follow our upgrade guide.