docs: update changelog and migration guide

xz64 · Nov 12, 2021 · 1fe17b0 · 1fe17b0
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.0.0] - 2021-11-11
+### Fixed
+- Fix `TypeError: item.node is not a function` errors by including `webpack-sources@^3.0.0` as direct dependency.
+
+### Removed
+- Remove support for webpack versions less than 5. Only webpack 5 is supported as of this version.
+
+
 ## [3.0.0] - 2021-10-02
 ### Fixed
 - Fix `TypeError: item.node is not a function` errors from webpack 5.47.0 and later

diff --git a/MIGRATION.md b/MIGRATION.md
@@ -1,5 +1,8 @@
 # Migration Guide
 
+## 3.x to 4.x
+* Support for webpack 4 and below are now removed. Please use an older version of the plugin if you need it to work with webpack 4 or below.
+
 ## 2.x to 3.x
 * Most builds can upgrade directly from 2.x to 3.x without having to change anything.
 * The `webpack-sources` package is no longer bundled with the plugin nor listed as a peerDependency of the plugin. This allows the plugin to use the same version of `webpack-sources` that comes with the `webpack` installation.