Upgrade to sbt 0.13.17.

sjrd · sjrd · commit 3ebfe4813d3e · 2018-03-28T21:54:35.000+02:00
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=0.13.16
+sbt.version=0.13.17
