Fix missing test dependency for python 2.7 / 3.4

diff --git a/setup.py b/setup.py
index d75614d09bf48638566aa1b4c82be37819cd2e74..71e9f505d08b2a86fc2259138f93fbeb1a7dad80 100755 (executable)
--- a/setup.py
+++ b/setup.py
@@ -71,6 +71,7 @@ direct manipulation of DNS zones, messages, names, and records.""",
     'python_requires': '>=3.4',
     'test_suite': 'tests',
     'provides': ['dns'],
+    'tests_require': ['typing ; python_version<"3.5"'],
     'extras_require': {
         'IDNA': ['idna>=2.1'],
         'DNSSEC': ['pycryptodome', 'ecdsa>=0.13'],