- fix #5, getChannel()
- fix KT0803K setChannel()
- fix readData()
- add several KT0803K specific functions (experimental)
- bool setMono()
- bool setStereo()
- bool isStereo()
- bool setBass(uint8_t bass)
- uint8_t getBass()
- bool powerOK()
- bool silenceDetected()
- update GitHub actions
- update readme.md
- update keywords.txt
- minor edits