Proposal: `ng doctor` for check diff and sync to the latest project template

[lacolaco]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request

Desired functionality.

After updated the CLI version, sometimes package.json is updated. Currently package.json is generated at ng new and never do sync to latest dependencies.

I want something like ng doctor to solve it. The use-case images are below:

$ ng doctor # listing up dependency changes
$ ng doctor --write  # auto-patching on _compatible_ version (with semver ?)

Mention any other details that might be useful.

[lucasvanhalst]

You could use this in the meantime which basically does what you described https://github.com/tjunnone/npm-check-updates

[lacolaco]

I want to know about added and removed dependencies. only existing packages version check is not enough.

[angular-robot]

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[angular-robot]

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