Uninstall-Module: add ability to uninstall dependent modules

From @dmilov on March 21, 2017 8:1

The use-case is to upgrade multiple modules to their new version. When there is a module with number of dependent modules Install-Module allows installing all dependent modules at once. If I need to upgrade the modules to new version with no willing to have multiple versions of certain module I'd expect to be able to uninstall module with all dependent modules at ones using Uninstall-Module.

Here is an example

Module A with version 1.0
Module B with version 1.0, which is required module in the A module's manifest

This call:
Install-Module -Name A -RequiredVersion 1.0

installs both A and B

When new versions of the above modules are published

Module A with version 2.0
Module B with version 2.0

I'd like to be able to

Uninstall-Module -Name A
Install-Module -Name A -RequiredVersion 2.0

and as a result to have installed only

A version 2.0
B version 2.0

Copied from original issue: PowerShell/PowerShell#3379

Start by tracing the Uninstall-Module and Install-Module entry points and the dependency information in module manifests. Reproduce the A/B version scenario described in the issue, then determine how dependent modules should be identified and removed. Done means uninstalling A also removes its dependent B when appropriate, so reinstalling A at version 2.0 leaves only A 2.0 and B 2.0.