An in-range update of react is breaking the build 🚨

## There have been updates to the *react* monorepo:

+ - The `devDependency` [react](https://github.com/facebook/react) was updated from `16.6.2` to `16.6.3`.
- The `devDependency` [react-dom](https://github.com/facebook/react) was updated from `16.6.2` to `16.6.3`.

🚨 [View failing branch](https://github.com/epeli/redux-stack/compare/master...epeli:greenkeeper%2Fmonorepo.react-16.6.3).

This version is **covered** by your **current version range** and after updating it in your project **the build failed**.

This monorepo update includes releases of one or more dependencies which all belong to the [react group definition](https://github.com/greenkeeperio/monorepo-definitions).

react is a devDependency of this project. It **might not break your production code or affect downstream projects**, but probably breaks your build or test tools, which may **prevent deploying or publishing**.

Status Details

- ❌ **Travis CI - Branch:** The build **failed**.

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Your [Greenkeeper](https://greenkeeper.io) Bot :palm_tree: