Bump to sbt 1.2.8

takezoe · takezoe · commit e9a9550e1496 · 2019-07-02T01:24:33.000+09:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.0.4
+sbt.version = 1.2.8
