feat: add nyc field (#81)

* feat: add `nyc` field

* docs: update readme

* fix: move `nyc` under jest

* fix: `Istanbul` lib name

Author: fisker

README.md

@@ -93,6 +93,7 @@ npx sort-package-json
 - [babel](https://babeljs.io/)
 - [eslint](https://eslint.org/)
 - [jest](https://jestjs.io/)
+- [Istanbul](https://istanbul.js.org/)
 - [xo](https://github.com/xojs/xo)
 - [prettier](https://prettier.io/)
 

index.js

@@ -54,6 +54,7 @@ const sortOrder = [
   'stylelint',
   'ava',
   'jest',
+  'nyc',
   'dependencies',
   'devDependencies',
   'peerDependencies',
@@ -176,6 +177,7 @@ function sortPackageJson(packageJson, options = {}) {
   sortSubKey('eslintConfig');
   sortSubKey('ava');
   sortSubKey('jest');
+  sortSubKey('nyc');
   sortSubKey('xo');
   sortSubKey('prettier');
   sortSubKey('dependencies');