Improve the typing check

Author: JezaChen

.github/workflows/python-package.yml

@@ -27,6 +27,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        # install typeshed
+        python -m pip install types-html5lib types-requests
         python -m pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
 

ihook/__init__.py

@@ -6,6 +6,9 @@
 import sys
 import inspect
 
+if typing.TYPE_CHECKING:
+    from _typeshed.importlib import LoaderProtocol
+
 # todo: unit tests to improve custom loader
 
 __all__ = [