Ionic v4 datetime binded to reactiveform

Bug Report

Ionic:

   ionic (Ionic CLI)          : 4.0.1 (/opt/node-v10.5.0-linux-x64/lib/node_modules/ionic)
   Ionic Framework            : @ionic/angular 4.0.0-beta.0
   @angular-devkit/core       : 0.7.0-rc.3
   @angular-devkit/schematics : 0.7.0-rc.3
   @angular/cli               : 6.0.8
   @ionic/ng-toolkit          : 1.0.0
   @ionic/schematics-angular  : 1.0.1

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0

System:

   NodeJS : v10.5.0 (/opt/node-v10.5.0-linux-x64/bin/node)
   npm    : 6.2.0
   OS     : Linux 4.15

Environment:

   ANDROID_HOME : not set

Describe the Bug Ion-datimetime cannot be binded properly to reactive form control. ion-input can be binded to the form but ion-datetime value are not binded properly to the form. The form control is not updated when ion-datetime is changed …

Steps to Reproduce Create a simple reactive form with one single control. Bind the control to a template ion-datetime

[MrSparklle]

Using Ionic Framework : @ionic/angular 4.0.0-beta.5

Ionic The ion-datetime has been binded properly to form control. But instead of a ISO-8601 format like ‘2017-08-21T00:00:00’ it persist a object like this:

{
  "dateBk": {
    "day": { "text": "21", "value": 21, "columnIndex": 0 },
    "month": { "text": "Aug", "value": 8, "columnIndex": 1 },
    "year": { "text": "2017", "value": 2017, "columnIndex": 2 }
  }
}

[ionitron-bot[bot]]

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