changelog: document the update `keepnans` keyword
1 files changed, 2 insertions(+), 0 deletions(-)

M CHANGELOG
M CHANGELOG +2 -0
@@ 19,6 19,8 @@ 
   reindexed on its inferred frequency
 
 ### Changed
+- api/update: have a `keepnans` keyword to explicitely accept
+  erasures
 - api/timeseries: allow a parameterless call (using the
   tshistory.cfg file to get its information)
 - util/replace_series: add an 'from_insertion_date' parameter