modified the tests accordingly

Author: shtouff

tests/test_model_serializer.py

@@ -119,7 +119,7 @@ class Meta:
                 positive_small_integer_field = IntegerField()
                 slug_field = SlugField(max_length=100)
                 small_integer_field = IntegerField()
-                text_field = CharField(style={'type': 'textarea'})
+                text_field = CharField(style={'base_template': 'textarea.html'})
                 time_field = TimeField()
                 url_field = URLField(max_length=100)
                 custom_field = ModelField(model_field=<tests.test_model_serializer.CustomField: custom_field>)