Allow arguments for tox type checks

Signed-off-by: Samuel Monson <smonson@redhat.com>

Author: sjmonson

tox.ini

@@ -58,7 +58,7 @@ description = Run type checks
 deps =
     .[dev]
 commands =
-    mypy --check-untyped-defs
+    mypy --check-untyped-defs {posargs}
 
 
 [testenv:links]