update changelog

Author: cpsievert

CHANGELOG.md

@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### New features
 
+* Adds vLLM support via a new `ChatVLLM` class. (#24)
+
 ### Bug fixes
 
 * `ChatOllama` no longer fails when a `OPENAI_API_KEY` environment variable is not set.

chatlas/_vllm.py

@@ -103,8 +103,8 @@ def __init__(
         self,
         base_url: str,
         model: str,
-        seed: int | None,
-        api_key: str | None,
+        seed: Optional[int],
+        api_key: Optional[str],
         kwargs: Optional["ChatClientArgs"],
     ):
         self.base_url = base_url