Post release: bump version string for development

Change-Id: Ic9dcb2c66b33a2fc04a6c9ca0dd97a4548d928ae
diff --git a/VERSION b/VERSION
index ac2cdeb..1ef72cb 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.1.3
+2.1.4-dev