test: Add auxiliary func to test module name != attr name

Author: effigies

tests/fake_pkg/__init__.py

@@ -1,5 +1,5 @@
 import lazy_loader as lazy
 
 __getattr__, __lazy_dir__, __all__ = lazy.attach(
-    __name__, submod_attrs={"some_func": ["some_func"]}
+    __name__, submod_attrs={"some_func": ["some_func", "aux_func"]}
 )

tests/fake_pkg/__init__.pyi

@@ -1 +1 @@
-from .some_func import some_func
+from .some_func import aux_func, some_func

tests/fake_pkg/some_func.py

@@ -1,2 +1,6 @@
 def some_func():
     """Function with same name as submodule."""
+
+
+def aux_func():
+    """Auxiliary function."""