discord.py rewrite

Starting from version 1.9.8, MusicBot requires the rewrite version of discord.py. It can be installed using the update files included, or by running python3 -m pip install -U -r requirements.txt.

Non-extensive list of changes:

• A fallback will be used if an i18n file cannot be parsed
• The save command now allows passing a custom URL
• Additional error handling has been added for experimental EQ
• Allow skipping bot update (but updating dependencies) when running the update script
• LegacySkip has been added as an option for those who prefer old skip behaviour
• Experimental EQ handling will now happen asynchronously
• Experimental EQ handling will take place after a track is downloaded, rather than before playing, to allow processing while the bot is playing other media
• A max search limit has been added to permissions
• Additional error handling has been added for Spotify
• open.spotify.com URLs are now supported
• Experimental EQ will no longer be enabled by default
• Changes have been made to the Dockerfile to allow it to work again
• discord.py now handles websocket reconnects and other issues, hopefully reducing the bot’s random disconnects
• Fixed streams using the wrong options for ffmpeg
• Large Spotify playlists will now be handled properly
• Fix an issue with setting the bot’s avatar

Translations have been contributed (thanks!):

• Japanese
• Korean