Add 'target' for emails

[russcarver]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [ x] feature request

OS and Version? I'm on macOS 10.14.5 Mojave (but this shouldn't matter)

Versions

Angular CLI: 7.3.9
Node: 10.15.3
OS: darwin x64
Angular: 5.2.11
... animations, common, compiler, compiler-cli, core, forms
... http, platform-browser, platform-browser-dynamic
... platform-server, router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.13.9 (cli-only)
@angular-devkit/build-optimizer   0.0.35
@angular-devkit/core              7.3.9 (cli-only)
@angular-devkit/schematics        7.3.9 (cli-only)
@schematics/angular               7.3.9 (cli-only)
@schematics/update                0.13.9 (cli-only)
rxjs                              5.5.12
typescript                        2.7.2
webpack                           3.10.0

Repro steps

I'm using this with Angular5 and Ionic3 (a hybrid mobile app). So when the user clicks on an email, I don't want the app (which runs in a browser) replaced by the email client. Please add the 'target' option for 'email' so that it can be '_blank'. Linkify shows that 'target' can specify 'email' (https://soapbox.github.io/linkifyjs/docs/options.html#target)

The log given by the failure

N/A

Desired functionality

The email app/page should open in a new tab.

Mention any other details that might be useful

N/A