Update pytz from 2019.2 to 2019.3

pyup-bot · pyup-bot · commit 62c5bb8dee3f · 2019-10-07T13:55:11.000-04:00
diff --git a/requirements_dev.txt b/requirements_dev.txt
@@ -2,6 +2,6 @@ bumpversion==0.5.3
 coverage==4.5.4
 flake8==3.7.8
 pytest==5.0.1
-pytz==2019.2
+pytz==2019.3
 Sphinx==2.1.2
 tox==3.13.2
