Update sbt to 1.3.12

scala-steward · huiwang · commit f270954fce97 · 2020-05-31T16:31:42.000+02:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.3.11
+sbt.version = 1.3.12
