We use sass only for the landing page. Versions >1.44.0 warn for
     an API change. But we only need to require one file. I didn't see
     how to use the new API without hitting the warning. We already
     just upgraded from node-sass to sass. So we can work with a
     slightly older new library, I'd say(;

     One of your dependencies, babel-preset-react-app, is importing
     the "@babel/plugin-proposal-private-property-in-object" package
     without declaring it in its dependencies. This is currently
     working because
     "@babel/plugin-proposal-private-property-in-object" is already in
     your node_modules folder for unrelated reasons, but it may break
     at any time.

     babel-preset-react-app is part of the create-react-app project,
     which is not maintianed anymore. It is thus unlikely that this
     bug will ever be fixed. Add
     "@babel/plugin-proposal-private-property-in-object" to your
     devDependencies to work around this error. This will make this
     message go away.