add YAML types library

gso/cli/imports.py

@@ -6,7 +6,7 @@ from pathlib import Path
 from typing import TypeVar
 
 import typer
-import yaml  # type: ignore[import-untyped]
+import yaml
 from pydantic import ValidationError
 
 from gso.api.v1.imports import (

requirements.txt

@@ -9,6 +9,7 @@ celery==5.3.4
 # Test and linting dependencies
 celery-stubs==0.1.3
 types-requests==2.31.0.1
+types-PyYAML==6.0.12.12
 pytest==7.4.3
 faker==19.13.0
 responses==0.24.0