readline in adafruit_esp32spi_socket uses a hardcoded end of line marker as '\r\n', this obviously does not work for all systems, it should be made definable.

I have updated the routine to do this and tested it out on a pyportal but do not have permissions to push a new branch back to the repo, please see the attached updated code (used a .txt suffix as .py is not allowed)

adafruit_esp32spi_socket.py.txt

regards,
Grae Morrison