typescript: Add a generic type to .view

[Uzlopak]

I missed the ability to add typings to the view data-parameter. So with this change, it is possible to provide view a type, as I would expect.

This change is non breaking.

So what does it do exactly?

If you provide a type, which has to be an Object-Interface, it makes the data-parameter mandatory and the provided data has to be of shape of that interface. So if you change the interface and miss to adapt the change in the view then typescript screams at you :).

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[mcollina]

lgtm

[climba03003]

LGTM.