Land angular/devkit #235 (SW support in schematics)

[alxhub]

Needed by the CLI before 1.6.0 can be released. Service Worker support for schematics.

[hansl]

PR merged and devkit released.

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}