Missing _lib/__init__.py (data-apis#66)

* Missing _lib/__init__.py

* lint

Author: crusaderky

src/array_api_extra/_lib/__init__.py

@@ -2,6 +2,8 @@ from types import ModuleType
 
 from ._typing import Array, Device
 
+# pylint: disable=missing-class-docstring,unused-argument
+
 class ArrayModule(ModuleType):
     def device(self, x: Array, /) -> Device: ...