Merge pull request #223 from INM-6/fix/importlib_version

remove version constraint of importlib-metadata

Author: rgerkin

setup.cfg

@@ -26,7 +26,7 @@ install_requires =
   cerberus>=1.2
   deepdiff
   gitpython
-  importlib-metadata<4.0
+  importlib-metadata
   ipykernel
   ipython
   jsonpickle