Add 'packaging' library into requirements in setup.py

Author: Vianney Taquet

setup.py

@@ -28,7 +28,7 @@
 """
 PYTHON_REQUIRES = ">=3.7"
 PACKAGES = find_packages()
-INSTALL_REQUIRES = ["scikit-learn", "numpy>=1.21"]
+INSTALL_REQUIRES = ["scikit-learn", "numpy>=1.21", "packaging"]
 EXTRAS_REQUIRE = {
     "tests": [
         "flake8",