But this is just a hot fix and it'll break again when the new version of sass-embedded is released, which depends on the newer version of rubygems. If the new version starts to depend on rubygems >= 3.4 which comes with bundler 2.4, this would be a problem as appraisal can't work with bundler 2.4.
There are several alternative solutions:
Use jekyll-sass-converter < 3.0. But this is not ideal as we can't keep up with its new versions.
Remove appraisal from dependencies of this plugin. As the latest 2.4.1 was released in July 2021, I don't think it's sufficiently maintained. I'd need to look for other libraries to enable testing with several versions of Jekyll. But testing with the latest Jekyll might be sufficient.
But this is just a hot fix and it'll break again when the new version of sass-embedded is released, which depends on the newer version of rubygems. If the new version starts to depend on rubygems >= 3.4 which comes with bundler 2.4, this would be a problem as appraisal can't work with bundler 2.4.
There are several alternative solutions: