Update scalafmt-core to 3.1.0#170

scala-steward wants to merge 1 commit intostephennancekivell:developstephennancekivell/scalatest-json:developfrom

scala-steward:update/scalafmt-core-3.1.0scala-steward/scalatest-json:update/scalafmt-core-3.1.0Copy head branch name to clipboard