relax dependency version requirement

Signed-off-by: Alberto Pianon <alberto@pianon.eu>

setup.py

@@ -33,7 +33,7 @@ setuptools.setup(
         'spdx-tools==0.6.1',
         'fossology==3.2.0',
 	'python-dotenv==1.0.1',
-        'packaging==20.9',
+        'packaging>=20.9',
         'flanker==0.9.11',
         'deepdiff==5.2.3',
         'beautifulsoup4==4.9.3',