Update dependencies and copyright year (#2436)

- aiohttp 3.5
- websockets 7
- Rapptz/discord.py@700dbb5
- A few others

Signed-off-by: Toby Harradine <tobyharradine@gmail.com>

redbot/__main__.py

@@ -183,7 +183,7 @@ def main():
         gathered = asyncio.gather(*pending, loop=red.loop, return_exceptions=True)
         gathered.cancel()
         try:
-            red.rpc.server.close()
+            loop.run_until_complete(red.rpc.close())
         except AttributeError:
             pass