feat(people): Add nationality and residence fields

See #1

people/forms.py

@@ -3,6 +3,8 @@ Forms for creating / updating models belonging to the 'people' app.
 """
 from django import forms
 
+from django_select2.forms import Select2Widget
+
 from . import models
 
 
@@ -16,6 +18,10 @@ class PersonForm(forms.ModelForm):
             'user',
             'relationship_targets',
         ]
+        widgets = {
+            'nationality': Select2Widget(),
+            'country_of_residence': Select2Widget(),
+        }
 
 
 class RelationshipForm(forms.ModelForm):