Python3 Support

[kornpow]

Since Python2 is EOL, it would be good to start moving to Python3. I am having a bit of difficulties with raspi-os latest release and python2 to install the python dependencies. Pip is about 1 version away from deprecating python2.7.

[kornpow]

I have a working python3 version. I am thinking about switching the gpio library to the gpiozero library, as wiringpi seems to be deprecated. Will make a PR soon