[deps] Pinned importlib-metadata

(cherry picked from commit ec20203)

Author: pandafy

setup.py

@@ -45,6 +45,9 @@
         'django-model-utils~=4.2.0',
         'django-compress-staticfiles~=1.0.1b',
         'swapper~=1.3.0',
+        # TODO: Remove when dropping support for Python 3.7
+        # For info, read https://stackoverflow.com/questions/73929564/
+        'importlib-metadata<5.0',
     ],
     extras_require={
         'qa': [