rollback to chardet to support python 3.10+

[brockhaywood]

Rollsback partridge to use chardet instead of cchardet. Due to this issue: https://github.com/remix/partridge/issues/73

Potential alternative fix: https://github.com/remix/partridge/pull/76

[brockhaywood]

Looks like travis no longer exists.. and tox has been removed https://github.com/remix/partridge/commit/a6741e0f2aab1b3cbd52f66567103a3ebb945e07 so im not sure what the compatibility of this is like