Adding updates to changelog

Author: Brendan Herger

README.rst

@@ -413,8 +413,8 @@ Development
 ******************
 * Fix issues with unicode names in ``get_names`` (#160).
 * Update to build using ``numpy==1.14`` and ``python==3.6`` (#154).
-* Add ``strategy`` and ``replacement`` parameters to ``CategoricalImputer`` to allow imputing
-  with values other than the mode (#144).
+* Add ``strategy`` and ``fill_value`` parameters to ``CategoricalImputer`` to allow imputing
+  with values other than the mode (#144), (#161).
 * Preserve input data types when no transform is supplied (#138).
 
 
@@ -497,6 +497,7 @@ Other contributors:
 * Ariel Rossanigo (@arielrossanigo)
 * Arnau Gil Amat (@arnau126)
 * Assaf Ben-David (@AssafBenDavid)
+* Brendan Herger (@bjherger)
 * Cal Paterson (@calpaterson)
 * @defvorfu
 * Gustavo Sena Mafra (@gsmafra)