Getting ready for release (react-boilerplate#2625)

* Dependency updates

* Sync hook test between template and internal apps

* Full changelog for v4

* Markdown syntax and release date

* Minor changelog update

* Tentative fix for Appveyor+Stylelint

* Another tentative fix for Appveyor+Stylelint

* Small dep upgrade

* Small dep update

Changelog.md

@@ -1,5 +1,73 @@
 # Changelog
 
+## RBP v4: "The One With Hooks (And Much More)" Edition (April 2019)
+
+### News
+
+React Boilerplate v4.0.0 is out and it's a doozy! Here are the highlights:
+
+- React has added many new features and it's time for React Boilerplate to embrace them.
+  - We now use `React.lazy` and `Suspense` for component lazy-loading instead of an external library.
+  - We've added `useInjectSaga` and `useInjectReducer` hooks to manage saga and reducer injection. They're integrated into the generators and thus become the new defaults. (Should you need them, the HOCs are still there.)
+  - The generators don't support classes anymore. The `PureComponent` vs `Component` choice was replaced with an option to wrap your component inside `React.memo`.
+- After much deliberation, `Immutable.js` is finally gone. We've added `Immer` instead. With it, we can write very concise and readable reducers while sticking to native JavaScript data structures.
+- Following the release of React Hooks, it's become even clearer that `react-testing-library` is now the industry-standard for React DOM testing. Workarounds for the incompatibilities between `enzyme` and `styled-components` are gone and we can now write leaner and more meaningful tests.
+
+There are many more changes to our documentation, internals and general project setup. You can find a full changelog below.
+
+Huge thanks to @Mensae, @gretzky, @jwinn and everyone who helped review or submit PRs! If I've forgotten your contribution in the credits below, please let me know.
+
+We hope you enjoy this release and welcome any feedback, bug reports or feature suggestions you can send our way!
+
+### Main
+
+- **Remove `Immutable.js` in favor of `Immer`** (**@julienben**, **@robertaird**)
+- **Migrate from `enzyme` to `react-testing-library`** (**@mensae**)
+  - New instructions for snapshot and behavior testing
+- **Embracing Hooks** (**@julienben**)
+  - Add `eslint-plugin-react-hooks`
+  - Migrate all class components to functions
+  - Add `useInjectSaga` and `useInjectReducer` hooks
+  - Remove generator options to extend `Component` or `PureComponent`. Replace with a `React.memo` option.
+- **Use `React.lazy` and `Suspense` instead of `loadable-components` to code-split and asynchronously load components** (**@julienben**)
+
+### Documentation updates
+
+- Update Heroku deployment instructions (**@TheAncientGoat**)
+- Add subfolder deployment instructions (**@nshimiye**)
+- Add AWS EB deployment instructions (**@Al-un**)
+- Spelling and grammar fixes (**@khayyamsaleem**, **@ngtan**)
+
+### Internals updates
+
+- Many dependency updates including: (**@julienben**)
+  - react and react-dom (`16.6` to `16.8.6`)
+  - react-redux (`5` to `7`) (**@bumi001**, **@jwinn**)
+  - connected-react-router (`4` to `6`)
+  - react-router-dom (`4` to `5`)
+  - redux-saga (`0.16` to `1`)
+  - sanitize.css (`4` to `8`)
+- Update default saga injection mode to DAEMON (**@howardya**)
+- Update generators to reflect all the stack changes
+- Migrate default Node version to `lts/dubnium` (**@julienben**)
+- Fix support for `stylelint` (**@jwinn**)
+- Fix setup script for Windows environments (**@mensae**)
+- Generate passing tests for components/containers (**@mjhost**)
+- Rewrite generators code (**@mensae**)
+- Complete rewrite or `generate-templates-for-linting.js` (**@mensae**)
+- `webpack.DefinePlugin` => `webpack.EnvironmentPlugin` (**@nshimiye**)
+- New Webpack code splitting config (**@julienben**)
+- Remove `process.noDeprecation = true` (**@spawnia**)
+- Miscellaneous fixes (**@ngtan**)
+
+### Project maintenance
+
+- Switch from Gitter to Spectrum (**@gretzky**)
+- Update Code of Conduct and Contribution Guidelines (**@julienben**)
+- New Issue Templates (**@gretzky**)
+- New bots to help with issue management (**@gretzky**)
+- Better recognition of contributors via adherence to [All Contributors](https://allcontributors.org/) specification (**@julienben**)
+
 ## 3.7 October 2018
 
 ### News

README.md

@@ -100,7 +100,7 @@ There’s also a <a href="https://vimeo.com/168648012">fantastic video</a> on ho
 
 ## Quick start
 
-1.  Make sure that you have Node.js v8.10 and npm v5 or above installed.
+1.  Make sure that you have Node.js v8.15.1 and npm v5 or above installed.
 2.  Clone this repo using `git clone --depth=1 https://github.com/react-boilerplate/react-boilerplate.git <YOUR_PROJECT_NAME>`
 3.  Move to the appropriate directory: `cd <YOUR_PROJECT_NAME>`.<br />
 4.  Run `npm run setup` in order to install dependencies and clean the git repo.<br />

app/utils/tests/injectSaga.test.js

@@ -136,12 +136,12 @@ describe('useInjectSaga hook', () => {
 
   it('should eject on unmount with a correct saga key', () => {
     const props = { test: 'test' };
-    const renderedComponent = renderer.create(
+    const { unmount } = render(
       <Provider store={store}>
         <ComponentWithSaga {...props} />
       </Provider>,
     );
-    renderedComponent.unmount();
+    unmount();
 
     expect(injectors.ejectSaga).toHaveBeenCalledTimes(1);
     expect(injectors.ejectSaga).toHaveBeenCalledWith('test');