Update sbt to 1.5.4 (#464)

scala-steward · web-flow · commit b6d1c1eeb76e · 2021-06-16T14:15:37.000-07:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.5.3
+sbt.version=1.5.4
