Merge pull request #50 from dmuhs/pyup-update-pip-20.1.1-to-20.2.1

Update pip to 20.2.1

requirements_dev.txt

@@ -1,6 +1,6 @@
 -r requirements.txt
 
-pip==20.1.1
+pip==20.2.1
 bumpversion==0.6.0
 wheel==0.34.2
 watchdog==0.10.3