Pin mock to latest version 4.0.3

pyup-bot · pyup-bot · commit 223d8626b94d · 2021-08-13T17:35:38.000+10:00
diff --git a/doc-requirements.txt b/doc-requirements.txt
@@ -1,4 +1,4 @@
 sphinx>=1.3
 sphinxcontrib-napoleon>=0.4.3
-mock
+mock==4.0.3
 sphinx_rtd_theme
