This library was forked from https://github.com/melwinVincent/ionic4-star-rating for a test of Ionic 5.
Run npm install --save https://github.com/JeongJun-Lee/ionic5-star-rating/tarball/master
Basically, same as https://github.com/melwinVincent/ionic4-star-rating/blob/master/README.md
But, there are two changes.
First, Use this selector ionic5-star-rating in HTML template.
Second, the event of ionic4-star-rating was removed because the Events was deprecated in Ionic 5. So you can't subscribe it anymore.