fix: wrong import location in serializers.py

Author: HoodyH

rest_framework/serializers.py

@@ -30,7 +30,7 @@
     get_referenced_base_fields_from_q, postgres_fields
 )
 from rest_framework.exceptions import ErrorDetail, ValidationError
-from rest_framework.fields import get_error_detail, BigIntegerField
+from rest_framework.fields import get_error_detail
 from rest_framework.settings import api_settings
 from rest_framework.utils import html, model_meta, representation
 from rest_framework.utils.field_mapping import (
@@ -56,7 +56,7 @@
     BooleanField, CharField, ChoiceField, DateField, DateTimeField, DecimalField,
     DictField, DurationField, EmailField, Field, FileField, FilePathField, FloatField,
     HiddenField, HStoreField, IPAddressField, ImageField, IntegerField, JSONField,
-    ListField, ModelField, MultipleChoiceField, ReadOnlyField,
+    ListField, ModelField, MultipleChoiceField, ReadOnlyField, BigIntegerField,
     RegexField, SerializerMethodField, SlugField, TimeField, URLField, UUIDField,
 )
 from rest_framework.relations import (  # NOQA # isort:skip