Merge pull request #891 from typelevel/update/scalafmt-core-3.9.0

Update scalafmt-core to 3.9.0

Author: danicheg

.scalafmt.conf

@@ -1,7 +1,7 @@
 # tune this file as appropriate to your style!  see:
 # https://scalameta.org/scalafmt/docs/configuration.html
 
-version = 3.8.6
+version = 3.9.0
 
 maxColumn = 100