chore(package): update diff to version 3.0.0
chore(package): update diff to version 3.0.0

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