chore(deps): update dependency matplotlib to v3.3.2 (#260)

Co-authored-by: Tim Swast <[email protected]>

Author: renovate-bot

samples/snippets/requirements.txt

@@ -4,7 +4,7 @@ google-auth-oauthlib==0.4.1
 grpcio==1.32.0
 ipython==7.16.1; python_version < '3.7'
 ipython==7.17.0; python_version >= '3.7'
-matplotlib==3.3.1
+matplotlib==3.3.2
 pandas==1.1.3
 pyarrow==1.0.1
 pytz==2020.1