Issue a warning when repository owner is changed

[ceremcem]

• I have read most of the list of known issues before filing this issue.
• I have searched for similiar issues before filing this issue. (took a quick look, though)

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This is an enhancement request: Due to a security vulnerability message of a dependency package, I took a look at the issue and understand the injection has been performed by a different person, not by the creator of the library.

Original author drops maintaining the library, then someone wants it, he hands it over. The new guy implements a malicious code, publishes it. Currently even the original author has no publish rights on npm.

What I could think of is that: npm-check-updates might warn us when owner is changed, like in the way:

************************************ WARNING ******************************************

This repository's owner has changed. You are advised to check on the new owner. 
Please type the new owner's mail address to continue: ...

************************************ WARNING ******************************************

[raineorshine]

Closed with the revive-me tag for interested contributors. See #484.