fix warnings on compile:

- raise Exception.Create instead of Exception.Toss (deprecated)
  - ReadUInt32 instead of ReadLogWord (deprecated)

IdHTTPWebsocketClient.pas

@@ -830,7 +830,7 @@ begin
       strmEvent.Clear;
 
       //first is the data type TWSDataType(text or bin), but is ignore/not needed
-      wscode := TWSDataCode(IOHandler.ReadLongWord);
+      wscode := TWSDataCode(IOHandler.ReadUInt32);
       if not (wscode in [wdcText, wdcBinary, wdcPing, wdcPong]) then
       begin
         //Sleep(0);

IdIOHandlerWebsocket.pas

@@ -416,12 +416,12 @@ begin
   begin
     CheckForDisconnect; //disconnected during wait in "Readable()"?
     if not Opened then
-      EIdNotConnected.Toss(RSNotConnected)
+      raise EIdNotConnected.Create(RSNotConnected) 
     else if not SourceIsAvailable then
-      EIdClosedSocket.Toss(RSStatusDisconnected);
+      raise EIdClosedSocket.Create(RSStatusDisconnected);
     GStack.CheckForSocketError(GStack.WSGetLastError); //check for socket error
     if ARaiseExceptionOnTimeout then
-      EIdReadTimeout.Toss(RSIdNoDataToRead)  //exit, no data can be received
+      raise EIdReadTimeout.Create(RSIdNoDataToRead)  //exit, no data can be received
     else
       Exit(0);
   end;
@@ -433,7 +433,7 @@ begin
     CheckForDisconnect; //disconnected in the mean time?
     GStack.CheckForSocketError(GStack.WSGetLastError); //check for socket error
     if ARaiseExceptionOnTimeout then
-      EIdNoDataToRead.Toss(RSIdNoDataToRead); //nothing read? then connection is probably closed -> exit
+      raise EIdNoDataToRead.Create(RSIdNoDataToRead); //nothing read? then connection is probably closed -> exit
   end;
   SetLength(VBuffer, Result);
 end;

IdServerWebsocketHandling.pas

@@ -95,7 +95,7 @@ begin
 
           strmRequest.Position := 0;
           //first is the type: text or bin
-          wscode := TWSDataCode(context.IOHandler.ReadLongWord);
+          wscode := TWSDataCode(context.IOHandler.ReadUInt32);
           //then the length + data = stream
           context.IOHandler.ReadStream(strmRequest);
           strmRequest.Position := 0;