Bump discord-py from 1.3.3 to 1.4.1

Bumps [discord-py](https://github.com/Rapptz/discord.py) from 1.3.3 to 1.4.1.
- [Release notes](https://github.com/Rapptz/discord.py/releases)
- [Commits](Rapptz/discord.py@v1.3.3...v1.4.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

requirements.txt

@@ -5,7 +5,7 @@ beautifulsoup4==4.8.2
 bs4==0.0.1
 certifi==2019.11.28
 chardet==3.0.4
-discord.py==1.3.3
+discord.py==1.4.1
 idna==2.8
 lavalink==3.1.1
 multidict==4.7.4