Convert to BusIO

• Change to using BusIO for SPI coms.

1.1.0 - add `enable50Hz`

Thanks to @newydave for the new feature :)

1.0.3 - Actions migration, Docs & Formatting, de-boolean

This release migrates the library to GitHub Actions and fixes formatting to be clang-format compliant. Additionally it has been updated thanks to @LinoBarreca to move from using boolean to bool

1.0.2 - Docs & Travis

Updated README and added travis config

fix for PT1000 & negative reads

1.0.1

fix for PT1000 negative temp calculation

initial release

go go go!