Merge pull request #1018 from adamtheturtle/pyup-update-sphinxcontrib-spelling-4.2.1-to-4.3.0

Update sphinxcontrib-spelling to 4.3.0

Author: adamtheturtle

dev-requirements.txt

@@ -21,7 +21,7 @@ pytest==4.6.0  # Test runners
 PyYAML==5.1.1
 Sphinx==2.1.2
 sphinx-autodoc-typehints==1.6.0
-sphinxcontrib-spelling==4.2.1
+sphinxcontrib-spelling==4.3.0
 twine==1.13.0
 versioneer==0.18
 vulture==1.0