Update Upstream

CONTRIBUTING.md

@@ -129,4 +129,4 @@ Make sure to test the released version! If you want to be extra careful, you can
 
 ------------
 
-*Many thanks to [h5bp](https://github.com/h5bp/html5-boilerplate/blob/master/CONTRIBUTING.md) for the inspiration with this contributing guide*
+*Many thanks to [h5bp](https://github.com/h5bp/html5-boilerplate/blob/master/.github/CONTRIBUTING.md) for the inspiration with this contributing guide*

packages/react-scripts/template/README.md

@@ -214,7 +214,7 @@ In addition to [ES6](https://github.com/lukehoban/es6features) syntax features,
 
 * [Exponentiation Operator](https://github.com/rwaldron/exponentiation-operator) (ES2016).
 * [Async/await](https://github.com/tc39/ecmascript-asyncawait) (ES2017).
-* [Object Rest/Spread Properties](https://github.com/sebmarkbage/ecmascript-rest-spread) (stage 3 proposal).
+* [Object Rest/Spread Properties](https://github.com/tc39/proposal-object-rest-spread) (ES2018).
 * [Dynamic import()](https://github.com/tc39/proposal-dynamic-import) (stage 3 proposal)
 * [Class Fields and Static Properties](https://github.com/tc39/proposal-class-public-fields) (part of stage 3 proposal).
 * [JSX](https://facebook.github.io/react/docs/introducing-jsx.html) and [Flow](https://flowtype.org/) syntax.
@@ -1099,7 +1099,7 @@ Create React App will add decorator support when the specification advances to a
 
 React doesn't prescribe a specific approach to data fetching, but people commonly use either a library like [axios](https://github.com/axios/axios) or the [`fetch()` API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) provided by the browser. Conveniently, Create React App includes a polyfill for `fetch()` so you can use it without worrying about the browser support.
 
-The global `fetch` function allows to easily makes AJAX requests. It takes in a URL as an input and returns a `Promise` that resolves to a `Response` object. You can find more information about `fetch` [here](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch).
+The global `fetch` function allows you to easily make AJAX requests. It takes in a URL as an input and returns a `Promise` that resolves to a `Response` object. You can find more information about `fetch` [here](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch).
 
 This project also includes a [Promise polyfill](https://github.com/then/promise) which provides a full implementation of Promises/A+. A Promise represents the eventual result of an asynchronous operation, you can find more information about Promises [here](https://www.promisejs.org/) and [here](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise). Both axios and `fetch()` use Promises under the hood. You can also use the [`async / await`](https://davidwalsh.name/async-await) syntax to reduce the callback nesting.
 
@@ -1611,7 +1611,7 @@ Popular CI servers already set the environment variable `CI` by default but you
 ```
 language: node_js
 node_js:
-  - 6
+  - 8
 cache:
   directories:
     - node_modules