Update sbt to 1.3.13

scala-steward · scala-steward · commit 75e8e481dcfe · 2020-06-28T00:17:40.000+02:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.3.12
+sbt.version=1.3.13
