Add pywin32 as a dependency

Fixes #52

Author: tonyroberts

README.md

@@ -10,7 +10,8 @@ See the [Python Jupyter Notebooks in Excel](https://www.pyxll.com/blog/python-ju
 - Jupyter >= 1.0.0
 - notebook >= 6.0.0
 - PySide2, or PySide6 for Python >= 3.10
-  
+- pywin32 >= 301, for `%xl_get`/`%xl_set` magic functions
+
 ### Optional
 
 - jupyterlab >= 4.0.0

pyproject.toml

@@ -23,7 +23,8 @@ dependencies = [
     "notebook >= 6.0.0",
     "packaging; python_version >= '3.10'",
     "PySide2; python_version < '3.10'",
-    "PySide6 != 6.4.2; python_version >= '3.10'"
+    "PySide6 != 6.4.2; python_version >= '3.10'",
+    "pywin32 >= 301"
 ]
 
 [project.urls]