require packaging

Author: cmbant

requirements.txt

@@ -2,3 +2,4 @@ numpy>=1.17.0
 matplotlib>=2.2.0,!=3.5.0
 scipy>=1.5.0
 PyYAML>=5.1
+packaging

setup.py

@@ -138,7 +138,8 @@ def run(self):
           'numpy (>=1.17.0)',
           'matplotlib (>=2.2.0,!=3.5.0)',
           'scipy (>=1.5.0)',
-          'PyYAML (>=5.1)'],
+          'PyYAML (>=5.1)',
+          'packaging'],
       # PySide is needed for the GUI
       extras_require={'GUI': ["PySide6>=6.10"]},
       cmdclass=cmd_class,