chore(deps): update dependency matplotlib to v3.3.3 (#385)

Author: renovate-bot

samples/snippets/requirements.txt

@@ -4,7 +4,7 @@ google-auth-oauthlib==0.4.2
 grpcio==1.33.2
 ipython==7.16.1; python_version < '3.7'
 ipython==7.17.0; python_version >= '3.7'
-matplotlib==3.3.2
+matplotlib==3.3.3
 pandas==1.1.4
 pyarrow==1.0.1
 pytz==2020.1