Turns out GitHub's `Licensee` gem treats any file with the word
"copyright" in it as a potential license, and therefore doesn't
recognize and list Roc's license as UPL-1.0 because it thinks
there might be two licenses or something.
d274e47c71/lib/licensee/project_files/license_file.rb (L26)
This way, GitHub's license finder doesn't get confused.
(They use the `Licensee` Ruby gem, which looks for files like
LICENSE, which we have, but also COPYRIGHT - and it apparently
gets confused if it sees both.)
I currently don't like how the xml is parsed. It is definitely
functional, but it is very strange. Serde is not made to deal with a
list of fields with the same name that aren't next to eachother in the
xml.
Splitting into binary and lib enables using the lib in tests.
main.rs is now a thin wrapper around the lib. In the future, the exact
code split should potentialy be changed so that main.rs does all arg
parsing and then calls into the lib with fully unwrapped parameters.
