add missing test dependency 'sieve'

nphilipp · nphilipp · commit d7821e8e35bc · 2016-03-23T09:28:52.000+01:00
diff --git a/setup.py b/setup.py
@@ -32,6 +32,7 @@
         'BeautifulSoup',
         'strainer',
         'WebTest',
+        'sieve'
     ],
     entry_points="""
         [tw2.widgets]
