Updating .auroraversion to 0.18.1-rc1.
diff --git a/.auroraversion b/.auroraversion
index 91cfd0d..e8c87e5 100644
--- a/.auroraversion
+++ b/.auroraversion
@@ -1 +1 @@
-0.18.1-SNAPSHOT
+0.18.1-rc1