bump crengine: CSS and image sizing fixes and tweaks (#7235)
bump crengine: CSS and image sizing fixes and tweaks (#7235)

Includes:
- CSS: add units vw vh vmin vmax
- CSS max-height: apply to block elements
- 2-pages mode/1-page number: fix title/author alternation
- EPUB: fix segfault on missing items in opf manifest
- (Upstream) CacheFileHeader: zero the alignment padding for reproducibility
- (Upstream) CSS: parse_number_value(): round to nearest
- getStyledImageSize(): tweak min/max-width/height computations
- getStyledImageSize(): don't ignore FB2/SVG <image> element
- getStyledImageSize(): hack to handle sizing via SVG wrappers
koreader/koreader,Hzj-jie/koreader,mwoz123/koreader,poire-z/koreader,NiLuJe/koreader,Frenzie/koreader,NiLuJe/koreader,koreader/koreader,Frenzie/koreader,pazos/koreader,poire-z/koreader