Expose upstr at package level

asvetlov · asvetlov · commit b9cbebc1234f · 2015-01-13T09:41:28.000+02:00
diff --git a/aiohttp/multidict.py b/aiohttp/multidict.py
@@ -2,7 +2,7 @@
 import sys
 
 __all__ = ['MultiDictProxy', 'CIMultiDictProxy',
-           'MultiDict', 'CIMultiDict']
+           'MultiDict', 'CIMultiDict', 'upstr']
 
 _marker = object()
 
