update for 0.9 release

chris1610 · Aug 19, 2021 · bc403e1 · bc403e1
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 # History
 
-# 0.9.0 (Dev)
+# 0.9.0 (2021-8-18)
 - Fix issue #19 so that users can release memory for big dataframes. Thanks Laurent Esingle.
 - Add new flatten() function to clean up multiindex column names
 - Fix bug where threshold would not work for categorical columns