Feature Request: Detect dead/deprecated packages.

I like that package provide easy way to detect updates. I work with react-native and I always have to update packages, so library is very useful for me.

Usually I accidentally find out that some package was renamed or dropped support.

It would be great if library can additionally provide support to detect problematic packages. I see few cases:

1. Monitor npm deprecated state. I see many times that package got renamed to another one. In many cases author put npm package in deprecated state.

2. Monitor dead packages. For example if package was not updated for a 3-5+ years. Usually these packages stop working and I have to replace such packages with alternatives.

I expect that we can use config file to enable these options. And ncu might look like this:

 @types/library        ^17.14.3  →  ^18.1.0 
 library-deprecated    deprecated
 library-dead          dead

Possible .ncurc.json

{
  "checkDeprecated": true,
  "checkDead": true,
}

This update might help to find problematic places and fix it before it become critical.