bump crengine: various fixes, support CSS "visibility" (#7265)
bump crengine: various fixes, support CSS "visibility" (#7265)

Includes:
- Fix max img height when small line-height
- getRenderedWidths(): fix consecutive non-collapsable spaces
- CSS: adds support for "visibility: hidden"
- Text: fix some bgcolor issues, handle fgcolor transparent
- remove global gRootFontSize
poire-z/koreader,koreader/koreader,NiLuJe/koreader,Frenzie/koreader,NiLuJe/koreader,poire-z/koreader,Frenzie/koreader,koreader/koreader,mwoz123/koreader,Hzj-jie/koreader