Allow 'nil' as an alias of []any{} in SendRequest/Notification

Author: cmaglie

msgpackrpc/connection.go

@@ -301,6 +301,10 @@ func (c *Connection) Close() {
 }
 
 func (c *Connection) SendRequest(ctx context.Context, method string, params []any) (reqResult any, reqError any, err error) {
+	if params == nil {
+		params = []any{}
+	}
+
 	id := MessageID(c.lastOutRequestsIndex.Add(1))
 
 	c.loggerMutex.Lock()
@@ -352,6 +356,10 @@ func (c *Connection) SendRequest(ctx context.Context, method string, params []an
 }
 
 func (c *Connection) SendNotification(method string, params []any) error {
+	if params == nil {
+		params = []any{}
+	}
+
 	c.loggerMutex.Lock()
 	c.logger.LogOutgoingNotification(method, params)
 	c.loggerMutex.Unlock()