Update to Angular 11

[markoberger]

Hi Formio

When will get the update to the latest version of Angular (11)?

Thank You

[travist]

I am hoping to work on it this week.

[BondocClaudiu]

I think the update to Angular 11 is already done, based on the package.json references & this comment: #92 (comment)

@travist correct me if I am wrong