fix(contacts): missing name property, types

[Manduro]

The @InstanceProperty for name was missing. This made it impossible to set the name of a contact properly, rendering this plugin pretty much useless for creating contacts.

There were also some type issues:

1. nickname should be type string
2. phoneNumbers should be type IContactField[]
3. All types should use interfaces, as the objects themselves have an _objectInstance property.
4. Contact should implement IContactProperties

These bugs came in at v1.3.0, where this plugin was refactored, although the changelog does not mention this.

[ihadeed]

thanks @Manduro