[requires.io] dependency update

Author: requires

tox.ini

@@ -318,7 +318,7 @@ basepython = {[default]basepython}
 
 deps =
     Sphinx==3.1.1
-    sphinx-rtd-theme==0.4.3
+    sphinx-rtd-theme==0.5.0
 
 commands =
     sphinx-build                           \