Pyduinocli

* Adds compatibility with arduino-cli 0.19.0

* The returned dict always has a `result` key

* All commands now return a dict that always have a "result" key

* All commands now return a `dict`, which breaks compatibility with previous versions
* All functions now at least what was printed on stdout and stderr (which may be nothing)

* Adds support for arduino-cli 0.18

* Adds support for arduino-cli 0.17.0
* Also supports arduino-cli 0.18.0