bump crengine, LodePNG, jpeg-turbo; MuPDF font tweak

crengine includes:
- ldomXRange/ldomMarkedRange: update enhanced drawing flag
- Hardcoded elements list: add <script>
- CSS: ensure selectors are applied in the order met
- elementFromPoint(): fix some floats not being visited
- Fix getPageDocumentRange() on bidi text
- Text: fix: allow wrap on space around images
- CSS/Text: adds "-cr-hint: strut-confined"
- Rename mispelled 'ident' and field 'margin' to 'indent"
- text-indent: some fixes, handle negative & hanging indent
- (Upstream) Minor cleanup and ifdef wraps
- lvtextfm: avoid possible segfault when hyphenating
- lvtextfm: avoid spurious spaces when hyphenating
- lvtextfm: dont adjust space after initial quotation mark/dash
- lvtextfm: ensure page-break:avoid on inline-block and images
- (Upstream) lvtinydom.cpp: fix old minor typo
- Fix internal/footnote links not working on some books

cre.cpp: also use enhanced selection drawing when highlighting
the footnote link with footnote popups.

MuPDF: switch fallback font from FreeSans to FreeSerif.
Bump LodePNG to 2020/01/20.
Bump jpeg-turbo to 2.0.4.

base

@@ -1 +1 @@
-Subproject commit 9751e5ae735ecaf6282b7b2c8982e41cca8ebedd
+Subproject commit 26bb2a880350a67768da68bbc2872b185405e474