Alan Agius 426c1da8a0 feat(@schematics/angular): hide universal schematic
The universal schematic by itself doesn't get you a working server application.

BREAKING CHANGE: universal schematic is now hidden and cannot be used with the `ng generate` command.

Users who want a working universal application should use `ng add @nguniversal/express-engine` or `ng add @nguniversal/hapi-engine`

Closes: #15166
2019-08-20 10:16:07 -07:00
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