changelog for webpack-dash-dynamic-import mini-css-extract-plugin fix

Author: alexcjohnson

CHANGELOG.md

@@ -161,6 +161,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ### Fixed
 
+- [#1858](https://github.com/plotly/dash/pull/1858) Support `mini-css-extract-plugin` Webpack plugin with `@plotly/webpack-dash-dynamic-import` node package - used by components to support dash async chunks. Updated dependencies of other `@plotly` node packages.
+
 - [#1836](https://github.com/plotly/dash/pull/1836) Fix `__all__` in dcc and table for extras: dcc download helpers and table format helpers. This also restores this functionality to the obsolete top-level packages `dash_core_components` and `dash_table`.
 
 - [#1822](https://github.com/plotly/dash/pull/1822) Remove Radium from renderer dependencies, as part of investigating React 17 support.