message: Use invariant culture for parsing double values
diff: // Licensed under the terms described in the LICENSE file in the root of this project.
  //
  using System;
  +using System.Globalization;
  using System.Xml;
  using static ColorTool.ConsoleAPI;
  @@ -45,15 +46,15 @@ namespace ColorTool
  {
  if (c.InnerText == RED_KEY)
  {
  - r = (int)(255 * Convert.ToDouble(c.NextSibling.InnerText));
  + r = (int)(255 * Convert.ToDouble(c.NextSibling.InnerText, CultureInfo.InvariantCulture));
  }
  else if (c.InnerText == GREEN_KEY)
  {
  - g = (int)(255 * Convert.ToDouble(c.NextSibling.InnerText));
  + g = (int)(255 * Convert.ToDouble(c.NextSibling.InnerText, CultureInfo.InvariantCulture));
  }
  else if (c.InnerText == BLUE_KEY)
  {
  - b = (int)(255 * Convert.ToDouble(c.NextSibling.InnerText));
  + b = (int)(255 * Convert.ToDouble(c.NextSibling.InnerText, CultureInfo.InvariantCulture));
  }
  else
  {
  