add fields method limiting the models columns fetched from db

setup.py

@@ -42,10 +42,10 @@ setup(
     version=get_version(PACKAGE),
     url=URL,
     license="MIT",
-    description="An simple async ORM with Fastapi in mind.",
+    description="An simple async ORM with fastapi in mind and pydantic validation.",
     long_description=get_long_description(),
     long_description_content_type="text/markdown",
-    keywords=['ORM', 'sqlalchemy', 'fastapi', 'pydantic', 'databases'],
+    keywords=['orm', 'sqlalchemy', 'fastapi', 'pydantic', 'databases', 'async', 'alembic'],
     author="collerek",
     author_email="collerek@gmail.com",
     packages=get_packages(PACKAGE),