Log Message:
py-soupsieve: updated to 1.9.3

1.9.3
- **FIX**: [attr!=value] pattern was mistakenly using :not([attr|=value]) logic \ 
instead of :not([attr=value]).
- **FIX**: Remove undocumented _QUIRKS mode flag. Beautiful Soup was meant to \ 
use it to help with transition to Soup
Sieve, but never released with it. Help with transition at this point is no \ 
longer needed.