Touched state does not propagate to the parent control. #320
Description
When using a sub or root component inside a parent form, the touched state does not propagate to the parent control.
If I type into a sub-form input and then blur it, the inner FormControl inside the sub-form becomes touched as expected, but the parent control that holds the sub-form value remains untouched.
The easiest example is using the address-control (from the ngx-sub-form main example) in my app.
<address-control [formControl]="controls.address">
Filling the fields of the address control (and then clicking out) results in controls.address.touched = false.
I would expect controls.address.touched to equal true.