upstage[minor]: release 0.6 (#45)

* bump langchain-openai and increment version

* update

libs/upstage/langchain_upstage/chat_models.py

@@ -140,9 +140,9 @@ def _get_ls_params(
     @model_validator(mode="after")
     def validate_environment(self) -> Self:
         """Validate that api key and python package exists in environment."""
-        if self.n < 1:
+        if self.n is not None and self.n < 1:
             raise ValueError("n must be at least 1.")
-        if self.n > 1 and self.streaming:
+        if self.n is not None and self.n > 1 and self.streaming:
             raise ValueError("n must be 1 when streaming.")
 
         client_params: dict = {
@@ -153,10 +153,11 @@ def validate_environment(self) -> Self:
             ),
             "base_url": self.upstage_api_base,
             "timeout": self.request_timeout,
-            "max_retries": self.max_retries,
             "default_headers": self.default_headers,
             "default_query": self.default_query,
         }
+        if self.max_retries is not None:
+            client_params["max_retries"] = self.max_retries
 
         if not (self.client or None):
             sync_specific: dict = {"http_client": self.http_client}