put IsHandshake onto public API

Author: mgravell

src/StackExchange.Redis/ClusterConfiguration.cs

@@ -381,10 +381,8 @@ public IList<ClusterNode> Children
         /// <summary>
         /// The handshake flag is set for nodes which are currently in the process of joining the cluster.
         /// They might not be fully configured, node IDs and slot ranges are placeholder information, and endpoint details 'best guess'.
-        /// We use this property only to filter out handshake nodes when building the configuration,
-        /// since they may be unusable, so it is not made public for now.
         /// </summary>
-        internal bool IsHandshake { get; }
+        public bool IsHandshake { get; }
 
         /// <summary>
         /// Gets whether this node is a replica.

src/StackExchange.Redis/PublicAPI/PublicAPI.Shipped.txt

@@ -165,6 +165,7 @@ StackExchange.Redis.ClusterNode.EndPoint.get -> System.Net.EndPoint?
 StackExchange.Redis.ClusterNode.Equals(StackExchange.Redis.ClusterNode? other) -> bool
 StackExchange.Redis.ClusterNode.IsConnected.get -> bool
 StackExchange.Redis.ClusterNode.IsFail.get -> bool
+StackExchange.Redis.ClusterNode.IsHandshake.get -> bool
 StackExchange.Redis.ClusterNode.IsMyself.get -> bool
 StackExchange.Redis.ClusterNode.IsNoAddr.get -> bool
 StackExchange.Redis.ClusterNode.IsPossiblyFail.get -> bool