Update sbt to 1.5.5

scala-steward · xuwei-k · commit 4470bf1e2c9a · 2021-07-12T20:50:20.000+09:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.5.4
+sbt.version=1.5.5
