Defer closing of fenced code blocks
Defer closing of fenced code blocks

This change allows us to process a blank line after the fenced code and set _lastLineBlank appropriately.

More info: https://github.com/jgm/commonmark.js/commit/48364e3cb64f0ba922e15e3bb503b487acfa907f

bcremer/commonmark,hason/commonmark,colinodell/commonmark,postalservice14/commonmark,kkiernan/commonmark,hason/commonmark,kkiernan/commonmark,thephpleague/commonmark,stof/commonmark,postalservice14/commonmark,garethellis36/commonmark,thephpleague/commonmark,garethellis36/commonmark,fesor/commonmark,fesor/commonmark