Update CHANGELOG to reflect latest changes
Update CHANGELOG to reflect latest changes

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