Repair Python 3.9 tests (#1257)

Author: akx

tox.ini

@@ -10,7 +10,11 @@ envlist =
 [testenv]
 extras =
     dev
-deps = {env:BABEL_TOX_EXTRA_DEPS:}
+deps =
+    # On Python 3.9, we need a version of Setuptools that still has pkg_resources
+    # to be able to run the Jinja extractor tests.
+    py39: setuptools<82
+    {env:BABEL_TOX_EXTRA_DEPS:}
 allowlist_externals = make
 commands = make clean-cldr test
 setenv =