Add packaging to dependencies (#173)

Author: ssbarnea

requirements.txt

@@ -67,6 +67,7 @@ myst-parser==0.18.1
     # via ansible-compat (setup.cfg)
 packaging==21.3
     # via
+    #   ansible-compat (setup.cfg)
     #   build
     #   pytest
     #   sphinx

setup.cfg

@@ -57,6 +57,7 @@ zip_safe = False
 
 # These are required in actual runtime:
 install_requires =
+  packaging
   PyYAML
   subprocess-tee >= 0.3.5
   jsonschema >= 4.6.0