Log Message:
py-soupsieve: updated to 2.4

2.4

- **NEW**: Update to support changes related to `:lang()` in the official CSS \ 
spec. `:lang("")` should match unspecified
  languages, e.g. `lang=""`, but not `lang=und`.
- **NEW**: Only `:is()` and `:where()` should allow forgiving selector lists \ 
according to latest CSS (as far as Soup
  Sieve supports "forgiving" which is limited to empty selectors).
- **NEW**: Formally drop Python 3.6.
- **NEW**: Formally declare support for Python 3.11.