[V3 Audio] Update audio to use Red-Lavalink (#1440)

* [V3 Audio] Update audio for Red-Lavalink

* Update requirements for new library

* Fix logic for connect time storage for audiostats

Only store time when connecting to the voice channel.

setup.py

@@ -130,6 +130,6 @@ setup(
         ],
         'mongo': ['motor'],
         'docs': ['sphinx', 'sphinxcontrib-asyncio', 'sphinx_rtd_theme'],
-        'voice': ['PyNaCl']
+        'voice': ['red-lavalink>=0.0.4']
     }
 )