bump crengine: count nb of images drawn & others (#4542)

Includes:
- Update french hyphenation pattern
- epub.css: update style for 'blockquote'
- DrawBuf: count nb of images and surface drawn

Adds Document:getDrawnImagesStatistics() to help deciding
if refresh with (possibly costly) dithering should be used
(on devices with HW dithering capabilities) with CreDocument:
when a page contains enough images to benefit from it.

frontend/document/credocument.lua

@@ -323,7 +323,7 @@ function CreDocument:drawCurrentView(target, x, y, rect, pos)
     -- change has been made, to avoid having crengine redraw the exact
     -- same buffer.
     -- And it could only change when some other methods from here are called
-    self._document:drawCurrentPage(self.buffer, self.render_color)
+    self._drawn_images_count, self._drawn_images_surface_ratio = self._document:drawCurrentPage(self.buffer, self.render_color)
     target:blitFrom(self.buffer, x, y, 0, 0, rect.w, rect.h)
 end