Add the ability to skip dependencies with ng update

[pavankjadda]

🚀 Feature request

Command (mark with an x)

• new
• build
• serve
• test
• e2e
• generate
• add
• update
• lint
• xi18n
• run
• config
• help
• version
• doc

Description

At present when I do ng update --all, the command fails when it finds incompatible dependencies(Attached image). I force update all dependencies and revert back incompatible dependencies through a shell script

Describe the solution you'd like

Provide the ability to skip dependencies through flag like below

ng update --all --skip "zone.js"

Describe alternatives you've considered

I have a script that force updates the all dependencies and reverts incompatible dependencies

### Update all dependencies
ng update --all --force

### Install compatible zone.js version
npm i zone.js@0.10.3 --save

[alan-agius4]

Also related to #15296