setup: Disallow untyped calls.

conservancy_beancount/plugin/__init__.py

@@ -24,6 +24,7 @@ from typing import (
     Dict,
     Iterable,
     List,
+    Optional,
     Set,
     Tuple,
     Type,
@@ -57,8 +58,11 @@ class HookRegistry:
             self.group_name_map.setdefault(key, set()).add(hook_cls)
         return hook_cls  # to allow use as a decorator
 
-    # This method is too dynamic to typecheck.
-    def import_hooks(self, mod_name, *hook_names, package=__module__):  # type:ignore
+    def import_hooks(self,
+                     mod_name: str,
+                     *hook_names: str,
+                     package: Optional[str]=__module__,  # type:ignore[name-defined]
+    ) -> None:
         module = importlib.import_module(mod_name, package)
         for hook_name in hook_names:
             self.add_hook(getattr(module, hook_name))

setup.cfg

@@ -4,6 +4,7 @@ typecheck=pytest --addopts="--mypy conservancy_beancount"
 
 [mypy]
 disallow_any_unimported = True
+disallow_untyped_calls = True
 disallow_untyped_defs = True
 show_error_codes = True
 strict_equality = True