bump crengine: tables rendering improvements and others

bump crengine, which includes:
- Adds support for symbol fonts (local or embedded)
- Fix some issues when rendering text in constrained width
- Page splitting: fix possible missing blocks
- CSS: adds support for 'auto', ignore % for borders
- Fix right border drawing position
- Fix: adds missing properties in copystyle()
- Adds comments, erm_killed rendering method
- Adds getRenderedWidths(): get node min/max node content width
- Tables rendering: fixes and improvements
- getRenderedWidths: enable min_width to be a single CJK char
- Fix wrong text wrap avoid in some case
- epub.css: add style for 'blockquote'
- Fix rendering issue when line ends with an image

Adds a few style tweaks related to tables.

Enforce table width: 100% in Wikipedia EPUBs to keep
previous look, which feels better with the various kinds
of tables in Wikipedia pages.

Fix unit tests as juliet.epub (full of blockquotes), grew quite
a few pages with the epub.css update.

spec/unit/readersearch_spec.lua

@@ -67,7 +67,7 @@ describe("Readersearch module", function()
         it("should find the last occurrence", function()
             -- local logger = require("logger")
             -- logger.info("nb of pages", doc:getPageCount())
-            -- 20180723: currently 189 pages
+            -- 20181206: currently 267 pages
             for i = 100, 180, 10 do
                 rolling:onGotoPage(i)
                 local words = search:searchFromEnd("Verona")
@@ -76,7 +76,7 @@ describe("Readersearch module", function()
                 -- logger.info("last match on page", pageno)
                 assert.truthy(pageno > 185)
             end
-            for i = 230, 235, 1 do
+            for i = 290, 335, 1 do
                 rolling:onGotoPage(i)
                 local words = search:searchFromEnd("Verona")
                 assert(words == nil)