DOC: Note in setup.py

setup.py

@@ -158,7 +158,7 @@ def setup_package():
         install_requires=["linkahead>=0.13.1",
                           "jsonref",
                           "jsonschema[format]>=4.4.0",
-                          "numpy>=1.17.3",
+                          "numpy>=1.17.3",  # With Py3.8, we could go up to 1.24
                           "openpyxl>=3.0.7",
                           "pandas>=1.2.0",
                           "xlrd>=2.0",