chore(package): update marko-prettyprint to version 1.2.0
chore(package): update marko-prettyprint to version 1.2.0

https://greenkeeper.io/
prettydiff/atom-beautify,Glavin001/atom-beautify,prettydiff/atom-beautify,Glavin001/atom-beautify,Glavin001/atom-beautify,Glavin001/atom-beautify,Glavin001/atom-beautify,prettydiff/atom-beautify,prettydiff/atom-beautify