Bump version to trigger a release build

Change-Id: I6e39d6a81828e682c1b29217dd0ff051aba370aa
diff --git a/VERSION b/VERSION
index d175cc5..78b1ce5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.8.19
\ No newline at end of file
+1.8.20
\ No newline at end of file