Add a heading for automated tests [skip ci]

README.md

@@ -24,6 +24,7 @@ If you need more advanced things like animations, lazy loading of images, or par
   - [Properties of `<ScrollView />`](#properties-of-scrollview)
 - [Dependencies](#dependencies)
 - [Development](#development)
+- [Automated tests](#automated-tests)
 - [Special thanks](#special-thanks)
 - [License](#license)
 
@@ -226,6 +227,8 @@ First make sure that you have [Node.js](https://nodejs.org/), [Yarn](https://yar
 
 If you choose to install emulators or simulators, you can use [the example app](/examples) to test your changes in a React Native app.
 
+#### Automated tests
+
 When making changes to the code, please add a unit test or a functional test to verify that the code is working. The test runner that the project uses is [Jest](https://jestjs.io/), [Enzyme](https://airbnb.io/enzyme/) is used to test React Components, and [Detox](https://github.com/wix/Detox) is used to run functional tests against the project's example app. The command to run unit tests is `yarn test` and the command to run functional tests is `yarn functional`.
 
 Before you submit the code for a Pull Request, make sure that you run `yarn test`, `yarn tsc`, and `yarn lint` to verify that unit tests pass and both the Typescript type checking and ESLint linting are not printing any errors.