Freezing matplotlib to 3.3.4

Change-Id: I44937fd9e7a8e4871a88d749a0141e03be96973a
diff --git a/VERSION b/VERSION
index 6ece8e7..e8f6dcd 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.8.17
+2.8.18