Update scalafmt-core to 2.3.1

scala-steward · scala-steward · commit 79be2db7a8f4 · 2019-12-06T14:11:23.000+01:00
diff --git a/.scalafmt.conf b/.scalafmt.conf
@@ -1,4 +1,4 @@
-version = "2.3.0"
+version = "2.3.1"
 edition = "2019-10"
 
 maxColumn = 140
