FACTscorer 0.2.0

This release contains numerous and major updates to all package functions to make them more modular and easier to maintain.
Most importantly for previous users, the functions no longer modify the input data frame. Instead, they return the scale scores in a separate data frame that users can into their original input data frame, if desired.
Other fixes to pass CRAN checks.
GitHub Actions added to automate package checks.

FACTscorer 0.1.0