2.2.18 & 2.0.239 (Sep 7, 2021)

* Changes in 2.2.18 (Sep 7, 2021)

+ Parallel ports support up to 11 digital output lines and 5 digital input
lines.

DO pins: 2, 3, 4, 5, 6, 7, 8, 9, 1, 14, 16, 17 (LSB -> MSB)
DI pins: 15, 13, 12, 10, 11 (LSB -> MSB)

- Some objects that do not provide the fieldnames method can be saved in the
data files now.