FIT KV: Replace test with null type fails

 name: "RuntimeBinderException"

    serialized: "Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: The type arguments for method \'Couchbase.KeyValue.ICouchbaseCollection.ReplaceAsync<T>(string, T, Couchbase.KeyValue.ReplaceOptions)\' cannot be inferred from the usage. Try specifying the type arguments explicitly.\n   at CallSite.Target(Closure, CallSite, ICouchbaseCollection, String, Object)\n   at System.Dynamic.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)\n   at Couchbase.Transactions.FitPerformer.SdkCommandExecutor.ExecuteCommand(Command op, ClusterConnection connection)\n   at Couchbase.Transactions.FitPerformer.SdkCommandExecutor.RunCommand(Command command, Counters counters, ClusterConnection connection, Action`1 consumer, String runId, StreamOwner streamOwner, ConcurrentDictionary`2 spans)"

  }