feat: add support for volta (#257)

defaultRules.md

@@ -92,6 +92,7 @@ _Note: when a specific key order is used, any other keys will be sorted in the e
 | packageManager        |                                                                                |
 | engines               | Key sort                                                                       |
 | engineStrict          | Key sort                                                                       |
+| volta                 | Key order: `node`, `npm`, `yarn`                                               |
 | languageName          |                                                                                |
 | os                    |                                                                                |
 | cpu                   |                                                                                |

index.js

@@ -124,6 +124,8 @@ const sortPrettierConfig = onObject(
   ]),
 )
 
+const sortVolta = sortObjectBy(['node', 'npm', 'yarn'])
+
 // See https://docs.npmjs.com/misc/scripts
 const defaultNpmScripts = new Set([
   'install',
@@ -290,6 +292,7 @@ const fields = [
   { key: 'packageManager' },
   { key: 'engines', over: sortObject },
   { key: 'engineStrict', over: sortObject },
+  { key: 'volta', over: sortVolta },
   { key: 'languageName' },
   { key: 'os' },
   { key: 'cpu' },

tests/fields.js

@@ -186,6 +186,20 @@ test('directories', macro.sortObject, {
   },
 })
 
+test('volta', macro.sortObject, {
+  path: 'volta',
+  value: {
+    yarn: '0.0.0',
+    npm: '0.0.0',
+    node: '0.0.0',
+  },
+  expect: {
+    node: '0.0.0',
+    npm: '0.0.0',
+    yarn: '0.0.0',
+  },
+})
+
 test('contributors', (t) => {
   const contributors = {
     contributors: [

tests/snapshots/main.js.md

@@ -107,6 +107,7 @@ Generated by [AVA](https://avajs.dev).
         "umd:main": "umd:main",␊
         "unpkg": "unpkg",␊
         "version": "version",␊
+        "volta": "volta",␊
         "workspaces": "workspaces",␊
         "xo": "xo"␊
       }`,
@@ -201,6 +202,7 @@ Generated by [AVA](https://avajs.dev).
         "packageManager": "packageManager",␊
         "engines": "engines",␊
         "engineStrict": "engineStrict",␊
+        "volta": "volta",␊
         "languageName": "languageName",␊
         "os": "os",␊
         "cpu": "cpu",␊