Update project layout, add new packages to setuptools discovery.

Author: surenkov

django_pydantic_field/v2/fields.py

@@ -226,6 +226,6 @@ def SchemaField(
     ...
 
 
-def SchemaField(schema=None, config=None, default=None, *args, **kwargs):  # type: ignore
+def SchemaField(schema=None, config=None, default=NOT_PROVIDED, *args, **kwargs):  # type: ignore
     truncate_deprecated_v1_export_kwargs(kwargs)
     return PydanticSchemaField(*args, schema=schema, config=config, default=default, **kwargs)

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "django-pydantic-field"
-version = "0.3.0-alpha1"
+version = "0.3.0-alpha2"
 description = "Django JSONField with Pydantic models as a Schema"
 readme = "README.md"
 license = { file = "LICENSE" }
@@ -47,6 +47,7 @@ dependencies = [
 [project.optional-dependencies]
 openapi = ["uritemplate"]
 dev = [
+    "build",
     "black",
     "isort",
     "mypy",
@@ -75,7 +76,12 @@ Source = "https://github.com/surenkov/django-pydantic-field"
 Changelog = "https://github.com/surenkov/django-pydantic-field/releases"
 
 [tool.setuptools]
-packages = ["django_pydantic_field"]
+packages = [
+    "django_pydantic_field",
+    "django_pydantic_field.compat",
+    "django_pydantic_field.v1",
+    "django_pydantic_field.v2",
+]
 
 [tool.isort]
 py_version = 311