Update setup.py

Author: ftgreat

setup.py

@@ -5,7 +5,7 @@
 
 setup(
     name="flagai",
-    version="v1.8.3",
+    version="v1.8.4",
     description="FlagAI aims to help researchers and developers to freely train and test large-scale models for NLP/CV/VL tasks.",
     long_description=open("README.md", encoding="utf-8").read(),
     long_description_content_type="text/markdown",