Update pyproject.toml

Author: bckohan

pyproject.toml

@@ -65,6 +65,10 @@ coverage = "^6.2"
 beautifulsoup4 = "^4.11.1"
 pytest-django = "^4.5.2"
 django-test-migrations = "^1.2.0"
+importlib-metadata = [
+    { version = "<5.0", markers = "python_version <= '3.7'" },
+    { version = ">=5.0", markers = "python_version > '3.7'" },
+]
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]