Update sphinx requirement from ~=4.0.2 to ~=4.1.2 (#79)

dependabot[bot] · web-flow · commit 02dfc751b3c6 · 2021-08-01T08:44:07.000-07:00
diff --git a/requirements-dev.txt b/requirements-dev.txt
@@ -12,6 +12,6 @@ flake8 ~=3.9.2
 pytest ~=6.2.4
 ipython ~=7.25.0
 numpydoc ~=1.1.0
-sphinx ~=4.0.2
+sphinx ~=4.1.2
 sphinx-copybutton ~=0.3.3
 sphinx_rtd_theme ~=0.5.2
