update changelog

CHANGELOG.md

@@ -7,6 +7,8 @@ All notable changes to this project will be documented in this file.
 
 * New metabox/form parameter, `show_on_cb`, allows you to conditionally display a cmb metabox/form via a callback. The `$cmb` object gets passed as a parameter to the callback. This complements the `'show_on_cb'` parameter that already exists for individual fields. Using this callback is similar to using the `'cmb2_show_on'` filter, but only applies to that specific metabox and it is recommended to use this callback instead as it minimizes th risk that your filter will affect other metaboxes.
 * Taxonomy types no longer save a value. The value getting saved was causing confusion and is not meant to be used. To use the saved taxonomy data, you need to use the WordPress term api, `get_the_terms `, `get_the_term_list`, etc.
+* Add `'multiple'` field parameter to store values in individual rows instead of serialized array. Will only work if field is not repeatable or a repeatable group. Props [JohnyGoerend](https://github.com/JohnyGoerend). ([#262](https://github.com/WebDevStudios/CMB2/pull/262), [#206](https://github.com/WebDevStudios/CMB2/issues/206), [#45](https://github.com/WebDevStudios/CMB2/issues/45)).
+
 
 ### Bug Fixes