chore(changelog): details about webpack version conflict from third party deps

Author: danbucholtz

CHANGELOG.md

@@ -5,6 +5,8 @@
 
 If you're upgrading directly from `1.3.12` or earlier, make sure you review the changelog for `2.0.0` and follow the [instructions here](https://github.com/ionic-team/ionic-app-scripts/releases/tag/v2.0.0). There were some very updates you'll need to make to your app.
 
+If you're customizing the build process and have a dependency that utilized `webpack@2.x`, it may be best to add an explicit `devDependency` on `webpack@3.1.0` to the project's `package.json` file. There have been a couple reports of non-standard 3rd party dependencies causing trouble with the `webpack` version.
+
 ### Bug Fixes
 
 * **generators:** no module by default ([#1096](https://github.com/ionic-team/ionic-app-scripts/issues/1096)) ([dfcaefa](https://github.com/ionic-team/ionic-app-scripts/commit/dfcaefa))