feat: add ava field (#80)

* feat: add `ava` field

* docs: add ava link

Author: fisker

README.md

@@ -88,6 +88,7 @@ npx sort-package-json
 
 ### Supported Libraries
 
+- [AVA](https://github.com/avajs/ava)
 - [bowserify](http://browserify.org/)
 - [babel](https://babeljs.io/)
 - [eslint](https://eslint.org/)

index.js

@@ -52,6 +52,7 @@ const sortOrder = [
   'eslintConfig',
   'eslintIgnore',
   'stylelint',
+  'ava',
   'jest',
   'dependencies',
   'devDependencies',
@@ -173,6 +174,7 @@ function sortPackageJson(packageJson, options = {}) {
   sortSubKey('browserify');
   sortSubKey('babel');
   sortSubKey('eslintConfig');
+  sortSubKey('ava');
   sortSubKey('jest');
   sortSubKey('xo');
   sortSubKey('prettier');