Merge pull request #1341 from VWS-Python/dependabot/pip/sphinx-3.4.0

Bump sphinx from 3.3.1 to 3.4.0

Author: adamtheturtle

dev-requirements.txt

@@ -4,7 +4,7 @@ black==20.8b1
 PyYAML==5.3.1
 Pygments==2.7.3
 Sphinx-Substitution-Extensions==2020.9.30.0
-Sphinx==3.3.1
+Sphinx==3.4.0
 VWS-Python-Mock==2020.10.3.0
 VWS-Test-Fixtures==2020.9.25.1
 autoflake==1.4