What does the ‘[Incompatible 1.270.0]’ in this context mean and how can I update the ‘tool-cppcheck’? PIO update does not update automatically, apparently.
pio update command will be deprecated in PlatformIO Core 6.0 and will do nothing. The cppcheck 1.270.0 is compatible with PlatformIO Core 6.0 (has not been yet released). However, you can try it via pio upgrade --dev.