v2.1.0

• [#33] added retry count field to event in persistent subscription listener: PersistentSubscriptionListener.onEvent(PersistentSubscription, ResolvedEvent) -> PersistentSubscriptionListener.onEvent(PersistentSubscription, RetryableResolvedEvent)
• [#40] added TLS certificate file validation (EventStoreBuilder.useSslConnection(new File("domain.csr")))
• [#42] fixed missing node preference when building eventstore from settings
• [#43] fixed multiple reconnects
• [#44] fixed reconnection issue - on previous esjc versions when driver encounters channel failure (e.g: connection reset by server) it disconnects without triggering reconnection. Now it logs an error and reconnects. If for some reason, you need the previous behavior - use EventStoreBuilder.disconnectOnTcpChannelError(true)
• fixed operations timeout check and retry on reconnect
• EventStore.iterateXXXX and EventStore.streamXXXX methods throws specific exceptions StreamNotFoundException or StreamDeletedException (was IllegalStateException)
• changed subscription drop due overflow reason SubscriptionDropReason.UserInitiated -> SubscriptionDropReason.ProcessingQueueOverflow
• added option to prefer master, slave or random node in cluster endpoint discoverer (cluster.preferRandomNode(true) -> cluster.nodePreference(NodePreference.Random))
• added eventNumber range check in EventStore.readStreamEventsBackward method
• added EventStore.subscribeToPersistent(stream, groupName, listener, autoAck) and EventStore.subscribeToPersistent(stream, groupName, listener, userCredentials, autoAck) overloaded methods
• added EventStoreBuilder.defaultExecutor() method
• bumped netty version to 4.1.34.Final
• bumped gson version to 2.8.5
• bumped slf4j api version to 1.7.26

Many thanks to all committers!