[py]: Bump mypy => 1.4.1

Author: symonk

py/tox.ini

@@ -13,7 +13,7 @@ commands = sphinx-build -b html -d ../build/doctrees docs/source ../build/docs/a
 [testenv:mypy]
 skip_install = true
 deps =
-  mypy==1.1.1
+  mypy==1.4.1
   lxml==4.9.1
   types-urllib3==1.26.25
   types-certifi==2021.10.8.3