[BUG] npm audit fix is not returning the arborist diff

[naugtur]

Is there an existing issue for this?

npm/rfcs#399
npm/rfcs#372 (comment)

Current Behavior

npm audit fix --json produces a summary with numbers of items added/removed/updated etc.

Expected Behavior

npm audit fix --json returns enough information to deduce:

• dependency tree path (in any reasonable form)
• package name (could be included in path)
• advisory id
• (nice to have) was it a breaking version bump

So that npm-audit-resolver and other tools could keep track of what has been fixed:
"1754|cssnano>cssnano-preset-default>postcss-svgo>svgo>css-select>css-what": {
"decision": "fix",
"madeAt": 1625857145332
},

Steps To Reproduce

1. npm init -y
2. npm i lodash@4.17.0
3. npm audit fix --json

Environment

• OS: any
• Node: any
• npm: 7