Update sbt to 1.5.3 (#352)

scala-steward · web-flow · commit 8ac7c4ab0912 · 2021-06-01T09:21:34.000+02:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.5.2
+sbt.version=1.5.3
