Update sbt to 1.4.9

scala-steward · scala-steward · commit 26ff3b52c798 · 2021-03-10T06:43:07.000+01:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.4.7
+sbt.version=1.4.9
