DOC: changelog

52d1869d · Paul McCarthy · 7fd7041b · 52d1869d
Commit 52d1869d authored Feb 18, 2020 by Paul McCarthy 🚵
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -24,6 +24,16 @@ Added
 * Processing functions can now be passed lists of values.


+Changed
+^^^^^^^
+
+
+* The processing function interface has been changed - processing functions
+  which return metadata for newly added columns must now return a sequence of
+  dicts containing arguments to the :class:`.Column` constructor, which can
+  include metadata.
+
+
 1.7.1 (Thursday 30th January 2020)
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