STM32duino, Arduino package which is developed by STMicroelectronics, added supporting of STM8.
Really cheap 8-bit microcontrollers. In this time supports STM8L152R8 (Nucleo STM8L152R8) and STM8S208RB (Nucleo STM8S208RB).

If you want to use Nucleo board which are mentioned above and you are using Windows 10, upgrade ST-LINK on Nucleo development board.
Some libraries of Arduino are not compatible with this library because Big Endian and Little Endian problem.

See the webpage https://github.com/stm32duino/Arduino_Core_STM8