Merge pull request facebook#204 from StefanSchoof/patch-1

@types into devDependencies

packages/react-scripts/template/README.md

@@ -1262,13 +1262,13 @@ When you encounter bugs caused by changing components, you will gain a deeper in
 If you’d like to test components in isolation from the child components they render, we recommend using [`shallow()` rendering API](http://airbnb.io/enzyme/docs/api/shallow.html) from [Enzyme](http://airbnb.io/enzyme/). To install it, run:
 
 ```sh
-npm install --save enzyme @types/enzyme enzyme-adapter-react-16 @types/enzyme-adapter-react-16 react-test-renderer @types/react-test-renderer
+npm install --save-dev enzyme @types/enzyme enzyme-adapter-react-16 @types/enzyme-adapter-react-16 react-test-renderer @types/react-test-renderer
 ```
 
 Alternatively you may use `yarn`:
 
 ```sh
-yarn add enzyme @types/enzyme enzyme-adapter-react-16 @types/enzyme-adapter-react-16 react-test-renderer @types/react-test-renderer
+yarn add --dev enzyme @types/enzyme enzyme-adapter-react-16 @types/enzyme-adapter-react-16 react-test-renderer @types/react-test-renderer
 ```
 
 #### `src/setupTests.ts`