`@angular-devkit/build-angular` is not updated when updating to CLI 8

[filipesilva]

🐞 Bug report

Command (mark with an x)

- [ ] new
- [ ] build
- [ ] serve
- [ ] test
- [ ] e2e
- [ ] generate
- [ ] add
- [x] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Is this a regression?

No.

Description

A clear and concise description of the problem...

@angular-devkit/build-angular is not updated when updating to CLI 8 via ng update @angular/cli.

🔬 Minimal Reproduction

Can be seen in #14228.

🔥 Exception or Error

No error.

🌍 Your Environment

Angular version 7.0.7

Anything else relevant?

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