build: add pytest-asyncio dependency

Author: mingi3314

pyproject.toml

@@ -7,7 +7,13 @@ requires-python = ">=3.11"
 dependencies = ["polars>=1.0.0,<2"]
 
 [dependency-groups]
-dev = ["mypy==1.15.0", "pre-commit>=4.2.0", "pytest>=8.3.5", "ruff==0.11.2"]
+dev = [
+    "mypy==1.15.0",
+ "pre-commit>=4.2.0",
+ "pytest>=8.3.5",
+ "pytest-asyncio>=1.0.0",
+ "ruff==0.11.2",
+]
 
 [build-system]
 requires = ["hatchling"]