title: Primeng Calendar - Not Updating formControlName value
body: <p>Selecting a new Calendar value does not update the value in the formControlName</p>
  
  <p>I tried setting the model property to a string, I also tried setting the dataType on the calendar to a string. To set the default value on the calendar from the model, I have to convert the value to a new date. Listening to onBlur also shows the old value, not the new value.</p>
  
  <p>I am using Angular 7, Ionic 4 and PrimeNg 7.1</p>
  
  <p>ngOnInit() {</p>
  
  <pre><code>  this.form = new FormGroup({
        dfrDate: new FormControl(null, {
          updateOn: 'blur',
          validators: [Validators.required]
        }),
  
  
  
  &lt;p-calendar  #dfrDateRef dataType="string"  showButtonBar="true" formControlName='dfrDate' [showIcon]="true" &gt;&lt;/p-calendar&gt;
  </code></pre>
  
  <p>I expect the form control value to update automatically, like all other form fields. I can get around this by using viewChild on form submission, but that would a pain to do for every date field in this app</p>