Use josepy instead of acme.jose. (#5203)

certbot-nginx/certbot_nginx/tests/util.py

@@ -5,11 +5,10 @@ import pkg_resources
 import tempfile
 import unittest
 
+import josepy as jose
 import mock
 import zope.component
 
-from acme import jose
-
 from certbot import configuration
 
 from certbot.tests import util as test_util