Add support for character input (`'A'`, `'B'`, `'C'`) in `isPressed()`#33

leonardocavagnis merged 5 commits intoarduino-libraries:mainarduino-libraries/Modulino:mainfrom

AntonioBerna:feature/button-alias-charAntonioBerna/Modulino:feature/button-alias-charCopy head branch name to clipboard