Update sbt to 1.4.9 (#123)

scala-steward · web-flow · commit 4bd20279ef0f · 2021-03-14T07:39:58.000-07:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.4.7
+sbt.version=1.4.9
