update release date

chfw · chfw · commit 1ee436ece5d5 · 2017-05-18T20:24:41.000+01:00
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
@@ -11,7 +11,7 @@ Updated
 #. `#19 <https://github.com/pyexcel/pyexcel-io/issues/19>`_,
    use cString by default
 
-0.3.4 - unreleased
+0.3.4 - 18.05.2017
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 Updated
