Support patching openai (#78)

* update docs

* add patch

* bump version

examples/patching/patching.py

@@ -0,0 +1,23 @@
+import openai
+from pydantic import BaseModel
+from openai_function_call import patch
+
+# By default, the patch function will patch the ChatCompletion.create and ChatCompletion.acreate methods. to support response_model parameter
+patch()
+
+
+# Now, we can use the response_model parameter using only a base model
+# rather than having to use the OpenAISchema class
+class UserExtract(BaseModel):
+    name: str
+    age: int
+
+user: UserExtract = openai.ChatCompletion.create(
+    model="gpt-3.5-turbo",
+    response_model=UserExtract,
+    messages=[
+        {"role": "user", "content": "Extract jason is 25 years old"},
+    ],
+)  # type: ignore
+
+print(user)