Use safer version of mro (#120)

Author: felix-hilden

docs/src/release_notes.rst

@@ -11,6 +11,7 @@ sphinx-codeautolink adheres to
 Unreleased
 ----------
 - Fix linking blocks with line numbers (:issue:`137`)
+- Use safer version of ``mro`` to support ``type`` (:issue:`120`)
 
 0.15.0 (2023-02-05)
 -------------------

src/sphinx_codeautolink/extension/resolve.py

@@ -83,7 +83,7 @@ def locate_type(cursor: Cursor, components: Tuple[str, ...], inventory) -> Curso
                 pass
 
         if isclass(previous.value) and cursor.location not in inventory:
-            for val in previous.value.mro():
+            for val in previous.value.__mro__:
                 name = fully_qualified_name(val)
                 if name + "." + component in inventory:
                     previous.location = name