Add eventsub package to setup.py

Author: EvieePy

setup.py

@@ -52,7 +52,13 @@
     author="TwitchIO",
     url="https://github.com/TwitchIO/TwitchIO",
     version=VERSION,
-    packages=["twitchio", "twitchio.ext.commands", "twitchio.ext.pubsub", "twitchio.ext.routines"],
+    packages=[
+        "twitchio",
+        "twitchio.ext.commands",
+        "twitchio.ext.pubsub",
+        "twitchio.ext.routines",
+        "twitchio.ext.eventsub",
+    ],
     license="MIT",
     description="An asynchronous Python IRC and API wrapper for Twitch.",
     long_description=readme,