chore: added @angular/forms as peer dependency

[csvn]

I just created a blank app with @angular/[email protected], and removed forms dependency (since I was not planning to use any forms). When serving up the app and adding @angular/material I got this error:

Seems to me that @angular/forms should be a peer dependency if material be imported without errors with no forms module.

[crisbeto]

@angular/forms will soon become an optional dependency. See #3792.

[csvn]

@crisbeto I had no idea, I did not find anything related. Feel free to close this PR then 🙂

[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.}