setup.py: update version

Author: miltondp

setup.py

@@ -11,7 +11,7 @@
 
 setuptools.setup(
     name="manubot-ai-editor",
-    version="0.3.5",
+    version="0.4.0",
     author="Milton Pividori",
     author_email="miltondp@gmail.com",
     description="A Manubot plugin to revise a manuscript using GPT-3",