bump crengine: CSS fixes and optimisations (#8427)
bump crengine: CSS fixes and optimisations (#8427)

Includes:
- lString32Collection::erase(): fix bounds checking
- ldomDocumentFragmentWriter: fix OnTagBody called twice
- CSS: optimize E.class rule check
- CSS: optimize E#id rule check
- EPUB: forward class attribute from the html element
NiLuJe/koreader,NiLuJe/koreader,poire-z/koreader,koreader/koreader,Frenzie/koreader,koreader/koreader,poire-z/koreader,Frenzie/koreader