Update ng-formworks version
### Feature Description

### What is happening?

The field format of `date-time` is broken in the currently used version 18.4.0 of ng-formworks.

### What you expect to happen?

Update ng-formworks to any of the following versions: 15.5.1/16.5.1/17.5.1/18.5.1/19.5.1

### What problems would this new feature solve?

The new versions of ng-formworks include:
- Fix: correct value returned by field with format of `date-time` ([Implementation of "datetime" and "datetime-local" formats are broken](https://github.com/zahmo/ng-formworks/issues/16#issuecomment-2645964283))
- New feature: adds title customization to type "array", similar to "tabarray" ([Feature request - Give "array" access to item fields, like "tabarray"](https://github.com/zahmo/ng-formworks/issues/15#issuecomment-2645953826))
