Update CHANGES

Author: asvetlov

CHANGES.txt

@@ -41,10 +41,14 @@ CHANGES
 - Use a create_future compatibility wrapper instead of creating
   Futures directly #896
 
-- Add test utilities to aiohttp. #902
+- Add test utilities to aiohttp #902
 
 - Improve Request.__repr__ #875
 
+- Skip DNS resolving if provided host is already an ip address #874
+
+- Add headers to ClientSession.ws_connect #785
+
 0.21.6 (05-05-2016)
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