fix: Python install python-okx --upgrade error && Error in file name

okx/__init__.py

@@ -2,4 +2,4 @@
 Python SDK for the OKX API v5
 
 """
-__version__="0.2.3"
+__version__="0.2.6"

okx/client.py

@@ -49,6 +49,6 @@ class Client(object):
         request_path = c.API_URL + c.SERVER_TIMESTAMP_URL
         response = self.client.get(request_path)
         if response.status_code == 200:
-            return response.json()['ts']
+            return response.json()['data'][0]['ts']
         else:
             return ""

setup.py

@@ -1,6 +1,6 @@
 import setuptools
 import okx
-with open("README.md", "r") as fh:
+with open("README.md", "r",encoding="utf-8") as fh:
     long_description = fh.read()
 
 setuptools.setup(

test/WsPrivateAsyncTest.py

@@ -1,6 +1,6 @@
 import asyncio
 
-from okx.websocket.WsPprivateAsync import WsPrivateAsync
+from okx.websocket.WsPrivateAsync import WsPrivateAsync
 
 
 def privateCallback(message):