Warnings could be addressed

[Django0]

It would be nice to have a clean build output. If possible, please fix these warnings:

/root/Arduino/libraries/TimerInterrupt/src/TimerInterrupt.h:249:5: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     volatile long getCount() __attribute__((always_inline))
     ^~~~~~~~
/root/Arduino/libraries/TimerInterrupt/src/TimerInterrupt.h:265:5: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     volatile long get_OCRValue() __attribute__((always_inline))
     ^~~~~~~~
/root/Arduino/libraries/TimerInterrupt/src/TimerInterrupt.h:270:5: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     volatile long get_OCRValueRemaining() __attribute__((always_inline))
     ^~~~~~~~

[khoih-prog]

Done by merging this PR Fixed warnings from cppcheck (platformio) and -Wall arduino-cli from you.

Thanks,