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
diff --git a/requirements.txt b/requirements.txt
index b53f166..39d66cc 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@
 git+https://github.com/zdw/robotframework-importresource@b81b87aabaee0594e966687b41e3674b866f28ee
 cord-robot==2.1.4
 virtualenv
-matplotlib==3.0.3
+matplotlib==3.3.4
 requests==2.24.0
 grpc-robot>=2.7.0
 kafka-robot>=2.3.2