Bumping version after 2.7 release

Change-Id: I2dcf7556f839592927fa218263646c38274833fa
diff --git a/VERSION b/VERSION
index 627a3f4..5fb11aa 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.1.1
+4.2.0-dev