[requires.io] dependency update

requires · requires · commit 39b1912f547f · 2021-01-07T09:14:23.000-08:00
diff --git a/tox.ini b/tox.ini
@@ -318,7 +318,7 @@ description = build documentation
 basepython = {[default]basepython}
 
 deps =
-    Sphinx==3.4.2
+    Sphinx==3.4.3
     sphinx-rtd-theme==0.5.1
 
 commands =
