Bump chardet from 3.0.4 to 4.0.0

Bumps [chardet](https://github.com/chardet/chardet) from 3.0.4 to 4.0.0.
- [Release notes](https://github.com/chardet/chardet/releases)
- [Commits](chardet/chardet@3.0.4...4.0.0)

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

requirements.txt

@@ -5,7 +5,7 @@ async-timeout==3.0.1
 attrs==20.3.0
 Authlib==0.14.3
 cffi==1.14.2
-chardet==3.0.4
+chardet==4.0.0
 cryptography==3.3.2
 gunicorn==20.0.4
 idna==3.1