Add mypy

ipython_markdown_inspector/__init__.py

@@ -1,5 +1,5 @@
 from functools import partial
-from typing import Any, Optional, Union
+from typing import Any, List, Optional, Union
 
 from IPython.core.interactiveshell import InteractiveShell
 from IPython.core.oinspect import OInfo
@@ -20,7 +20,7 @@ def hook(
         # fallback for IPython 8.21
         obj = obj_or_data
         detail_level = 0
-        omit_sections = []
+        omit_sections: List[str] = []
         info_dict = ipython.inspector.info(
             obj, "", info=info, detail_level=detail_level
         )
@@ -50,4 +50,4 @@ def unload_ipython_extension(ipython: InteractiveShell):
         ipython.inspector.mime_hooks["text/markdown"] = ORIGINAL_HOOK
 
 
-__all__ = []
+__all__: List[str] = []

ipython_markdown_inspector/_hook_data.py

@@ -1,5 +1,5 @@
 try:
-    from IPython.core.oinspect import InspectorHookData
+    from IPython.core.oinspect import InspectorHookData  # type: ignore
 except ImportError:
     # TODO: remove once we require a version which includes
     # https://github.com/ipython/ipython/pull/14342

pyproject.toml

@@ -36,7 +36,8 @@ Changelog = "https://github.com/krassowski/ipython-markdown-inspector/blob/main/
 
 [project.optional-dependencies]
 test = [
-    "pytest"
+    "pytest",
+    "mypy"
 ]
 dev = [
     "build",