Update sbt to 1.5.4 (softwaremill#271)

ghostbuster91 · web-flow · commit c98d68ea9135 · 2021-07-05T22:12:12.000+02:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.4.6
+sbt.version=1.5.4
