build: Update sbt, sbt-dependency-tree from 1.5.4 to 1.5.5

j5ik2o-bot[bot] · j5ik2o · commit e25fad0c1137 · 2021-07-13T08:41:05.000+09:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.5.4
+sbt.version = 1.5.5
