PusherClient now targets net45, net472, netstandard1.3 and netstandard2.0

[erwin42]

Description

New major release, addressing a lot of current issues.

Fixes issues #35, #45, #74, #89 #91 and #101 🎉

CHANGELOG

• [FIXED] Infinite loop when failing to connect for the first time.
• [FIXED] Bug: GenericPresenceChannel's AddMember and RemoveMember events were not being emitted.
• [FIXED] Change MemberRemovedEventHandler to MemberRemovedEventHandler.
• [FIXED] Introduce new ChannelUnauthorizedException class.
• [FIXED] Bug: calling Channel.Unsubscribe would only set IsSubscribed to false and not remove the channel subscription.
• [FIXED] Bug: Pusher can error if any of the delegate events raise errors.
• [FIXED] Bug: PusherEvent.Data fails to serialize for types other than string.
• [FIXED] Concurrency issues in EventEmmiter.
• [FIXED] Failing tests for Pusher apps in a cluster other than the default.
• [FIXED] Issues in the Example app and removed the use of dynamic types.
• [CHANGED] PusherClient project structure to target .NET 4.5, .NET 4.7.2, .NET Standard 1.3 and .NET Standard 2.0.
• [CHANGED] The events emitted by Pusher.ConnectionStateChanged. Connecting and Connected are new. Initialized has been removed. Disconnecting, Disconnected and WaitingToReconnect remain unchanged.
• [CHANGED] Pusher methods ConnectAsync and DisconnectAsync to return void instead of ConnectionState.
• [CHANGED] Pusher.SubscribeAsync to take an optional SubscriptionEventHandler parameter.
• [CHANGED] Separate PusherEvent, string and dynamic emitters into separate classes.
• [CHANGED] Bump PusherServer version to 4.4.0.
• [CHANGED] PusherClient project structure to target .NET 4.5, .NET 4.7.2, .NET Standard 1.3 and .NET Standard 2.0.
• [REMOVED] public property Pusher.Channels; it is now private.
• [REMOVED] public property GenericPresenceChannel.Members; it is now private.
• [REMOVED] The following ConnectionState values: Initialized, NotConnected, AlreadyConnected, ConnectionFailed and DisconnectionFailed.
• [REMOVED] public Channel.Subscribed; it is now internal.
• [REMOVED] Pusher.Trace property.
• [ADDED] To Pusher class: methods UnsubscribeAsync, UnsubscribeAllAsync, GetChannel and GetAllChannels; event delegate Subscribed.
• [ADDED] To GenericPresenceChannel class: methods GetMember and GetMembers.
• [ADDED] ClientTimeout to PusherOptions and implemented client timeouts with tests.
• [ADDED] Json config file for test application settings.
• [ADDED] Client side event triggering validation.
• [ADDED] ITraceLogger interface and TraceLogger class, tracing is disabled by default. New TraceLogger property added to PusherOptions.

[damdo]

Super impressive! Thanks for all you hard work @erwin42!