Update CONTRIBUTING to mention Yarn, and update build status badge

Author: markerikson

CONTRIBUTING.md

@@ -1,9 +1,11 @@
 # Contributing
-We are open to, and grateful for, any contributions made by the community.  By contributing to React Redux, you agree to abide by the [code of conduct](https://github.com/reduxjs/react-redux/blob/master/CODE_OF_CONDUCT.md). 
+
+We are open to, and grateful for, any contributions made by the community. By contributing to React Redux, you agree to abide by the [code of conduct](https://github.com/reduxjs/react-redux/blob/master/CODE_OF_CONDUCT.md).
 
 Please review the [Redux Style Guide](https://redux.js.org/style-guide/style-guide) in the Redux docs to keep track of our best practices.
 
 ## Reporting Issues and Asking Questions
+
 Before opening an issue, please search the [issue tracker](https://github.com/reduxjs/react-redux/issues) to make sure your issue hasn't already been reported.
 
 Please ask any general and implementation specific questions on [Stack Overflow with a Redux tag](http://stackoverflow.com/questions/tagged/redux?sort=votes&pageSize=50) for support.
@@ -13,43 +15,56 @@ Please ask any general and implementation specific questions on [Stack Overflow
 Visit the [Issue tracker](https://github.com/reduxjs/react-redux/issues) to find a list of open issues that need attention.
 
 Fork, then clone the repo:
+
 ```
 git clone https://github.com/your-username/react-redux.git
 ```
 
+This repository uses Yarn v2 to manage packages. You'll need to have Yarn v1.22 installed globally on your system first, as Yarn v2 depends on that being available first. Install dependencies with:
+
+```
+yarn install
+```
+
 ### Building
 
 Running the `build` task will create both a CommonJS module-per-module build and a UMD build.
+
 ```
-npm run build
+yarn build
 ```
 
 To create just a CommonJS module-per-module build:
+
 ```
-npm run build:lib
+yarn build:lib
 ```
 
 To create just a UMD build:
+
 ```
-npm run build:umd
-npm run build:umd:min
+yarn build:umd
+yarn build:umd:min
 ```
 
 ### Testing and Linting
 
 To run the tests:
+
 ```
-npm run test
+yarn test
 ```
 
 To continuously watch and run tests, run the following:
+
 ```
-npm test -- --watch
+yarn test --watch
 ```
 
 To perform linting with `eslint`, run the following:
+
 ```
-npm run lint
+yarn lint
 ```
 
 ### New Features
@@ -58,11 +73,11 @@ Please open an issue with a proposal for a new feature or refactoring before sta
 
 ## Submitting Changes
 
-* Open a new issue in the [Issue tracker](https://github.com/reduxjs/react-redux/issues).
-* Fork the repo.
-* Create a new feature branch based off the `master` branch.
-* Make sure all tests pass and there are no linting errors.
-* Submit a pull request, referencing any issues it addresses.
+- Open a new issue in the [Issue tracker](https://github.com/reduxjs/react-redux/issues).
+- Fork the repo.
+- Create a new feature branch based off the `master` branch.
+- Make sure all tests pass and there are no linting errors.
+- Submit a pull request, referencing any issues it addresses.
 
 Please try to keep your pull request focused in scope and avoid including unrelated commits.
 

README.md

@@ -1,14 +1,12 @@
-React Redux
-=========================
+# React Redux
 
 Official React bindings for [Redux](https://github.com/reduxjs/redux).  
 Performant and flexible.
 
-[![build status](https://img.shields.io/travis/reduxjs/react-redux/master.svg?style=flat-square)](https://travis-ci.org/reduxjs/react-redux) [![npm version](https://img.shields.io/npm/v/react-redux.svg?style=flat-square)](https://www.npmjs.com/package/react-redux)
+![GitHub Workflow Status](https://img.shields.io/github/workflow/status/reduxjs/react-redux/CI?style=flat-square) [![npm version](https://img.shields.io/npm/v/react-redux.svg?style=flat-square)](https://www.npmjs.com/package/react-redux)
 [![npm downloads](https://img.shields.io/npm/dm/react-redux.svg?style=flat-square)](https://www.npmjs.com/package/react-redux)
 [![redux channel on discord](https://img.shields.io/badge/[email protected]?style=flat-square)](http://www.reactiflux.com)
 
-
 ## Installation
 
 ### Using Create React App
@@ -35,18 +33,17 @@ yarn add react-redux
 
 You'll also need to [install Redux](https://redux.js.org/introduction/installation) and [set up a Redux store](https://redux.js.org/recipes/configuring-your-store/) in your app.
 
-This assumes that you’re using [npm](http://npmjs.com/) package manager 
-with a module bundler like [Webpack](https://webpack.js.org/) or 
-[Browserify](http://browserify.org/) to consume [CommonJS 
+This assumes that you’re using [npm](http://npmjs.com/) package manager
+with a module bundler like [Webpack](https://webpack.js.org/) or
+[Browserify](http://browserify.org/) to consume [CommonJS
 modules](https://webpack.js.org/api/module-methods/#commonjs).
 
-If you don’t yet use [npm](http://npmjs.com/) or a modern module bundler, and would rather prefer a single-file [UMD](https://github.com/umdjs/umd) build that makes `ReactRedux` available as a global object, you can grab a pre-built version from [cdnjs](https://cdnjs.com/libraries/react-redux). We *don’t* recommend this approach for any serious application, as most of the libraries complementary to Redux are only available on [npm](http://npmjs.com/).
+If you don’t yet use [npm](http://npmjs.com/) or a modern module bundler, and would rather prefer a single-file [UMD](https://github.com/umdjs/umd) build that makes `ReactRedux` available as a global object, you can grab a pre-built version from [cdnjs](https://cdnjs.com/libraries/react-redux). We _don’t_ recommend this approach for any serious application, as most of the libraries complementary to Redux are only available on [npm](http://npmjs.com/).
 
 ## React Native
 
 As of React Native 0.18, React Redux 5.x should work with React Native. If you have any issues with React Redux 5.x on React Native, run `npm ls react` and make sure you don’t have a duplicate React installation in your `node_modules`. We recommend that you use `[email protected]` which is better at avoiding these kinds of issues.
 
-
 ## Documentation
 
 The React Redux docs are now published at **https://react-redux.js.org** .
@@ -55,9 +52,9 @@ We're currently expanding and rewriting our docs content - check back soon for m
 
 ## How Does It Work?
 
-We do a deep dive on how React Redux works in [this readthesource episode](https://www.youtube.com/watch?v=VJ38wSFbM3A).  
+We do a deep dive on how React Redux works in [this readthesource episode](https://www.youtube.com/watch?v=VJ38wSFbM3A).
 
-Also, the post [The History and Implementation of React-Redux](https://blog.isquaredsoftware.com/2018/11/react-redux-history-implementation/) 
+Also, the post [The History and Implementation of React-Redux](https://blog.isquaredsoftware.com/2018/11/react-redux-history-implementation/)
 explains what it does, how it works, and how the API and implementation have evolved over time.
 
 Enjoy!