Update build to sbt 1.3.0-RC1

ashawley · ashawley · commit bd75ba8730b1 · 2019-05-16T11:30:09.000-04:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.2.8
+sbt.version=1.3.0-RC1
