Backported fixes

• Dealias types in `New`` before matching quotes #17615
• Fix accessibleType for package object prefixes #18057

Contributors

Thank you to all the contributors who made this release possible 🎉

According to git shortlog -sn --no-merges 3.3.1-RC1..3.3.1-RC2 these are:

     2 Martin Odersky
     2 Paweł Marks
     1 Nicolas Stucki