Update highlighter (fix for dropped escapes)

sideshowbarker · domenic · commit a6f53cd3231f · 2019-05-31T13:56:57.000+02:00
This change updates the highlighter submodule to pull in change tabatkins/highlighter@e1ce407, the fix for the issue reported at tabatkins/highlighter#10 (escapes getting lost in pre blocks).
diff --git a/highlighter b/highlighter
@@ -1 +1 @@
-Subproject commit babd92056d969350e4245f60df1dca8c93299890
+Subproject commit e1ce40773ecd94d9577133e6bc5f6d9d46c20139
