Update sbt to 1.4.7 (#358)

scala-steward · web-flow · commit 56bd5b147a78 · 2021-02-03T09:16:12.000+01:00
[skip ci]
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.4.6
+sbt.version=1.4.7
