2.5.0

Breaking changes:

• All actor interfaces are now required to inherit IGrainWithStringKey together with IActorGrain (#148)
• StorageProviderFacet and [UseStorageProvider] attribute were removed in favor of native PersistentStateFactory (get it from container) and PersistentState attribute respectively (doc)
• Less strict signature for actor ref middleware (object instead of TResult)
• Naming symmetry between ActorRefMiddleware and ActorMiddleware (ie Receive instead of Send-Receive pair)
• Unified design of Next handling between ActorRefMiddleware and ActorMiddleware. Now subclasses need to call base.Receive to call next handler in a chain
• Per-type middlewares were removed as a feature to avoid confusion. Use global pipeline and type filtering inside the middleware
• Direct client middleware configuration was removed. Now single actor ref middleware is used for all clients

New api:

• Exposed function to get actor grain interface from actor class
• Additional method overload for extracting messages from InvokeMethodRequest to simplify matching in F#