fix: use CJS shims for stream (#179)

Co-authored-by: Dimitri Kennedy <[email protected]>

Author: morgante

.changeset/eighty-zoos-walk.md

@@ -0,0 +1,5 @@
+---
+"@instructor-ai/instructor": minor
+---
+
+Restore CommonJS compatibility for OpenAI streaming

src/instructor.ts

@@ -9,7 +9,7 @@ import {
   ReturnTypeBasedOnParams
 } from "@/types"
 import OpenAI from "openai"
-import { Stream } from "openai/streaming.mjs"
+import { Stream } from "openai/streaming"
 import { z, ZodError } from "zod"
 import ZodStream, { OAIResponseParser, OAIStream, withResponseModel, type Mode } from "zod-stream"
 import { fromZodError } from "zod-validation-error"