Update sbt to 1.4.0 (#194)

scala-steward · web-flow · commit 3390a81c1453 · 2020-10-14T21:05:27.000-07:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.3.13
+sbt.version=1.4.0
