angular-devkit depends on deprecated istanbul

[kyliau]

🐞 Bug report

Command (mark with an x)

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

Is this a regression?

No.

Description

When ng new installs node dependencies, yarn/npm produces the following warning:

warning @angular-devkit/build-angular > [email protected]: This module is no longer maintained, try this instead:
  npm i nyc
Visit https://istanbul.js.org/integrations for other alternatives.

🔬 Minimal Reproduction

ng new demo --defaults

🔥 Exception or Error

🌍 Your Environment

Package                      Version
------------------------------------------------------
@angular-devkit/architect    0.13.0-rc.0
@angular-devkit/core         7.3.0-rc.0
@angular-devkit/schematics   7.3.0-rc.0
@angular/bazel               0.0.0
@angular/cli                 7.3.0-rc.0
@schematics/angular          7.3.0-rc.0
@schematics/update           0.13.0-rc.0
rxjs                         6.3.3
typescript                   3.2.2

Anything else relevant?

[angular-automatic-lock-bot]

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