chore(package): update browser-sync to version 2.9.12
chore(package): update browser-sync to version 2.9.12

http://greenkeeper.io/

no-stack-dub-sack/freeCodeCamp,FreeCodeCamp/FreeCodeCamp,DusanSacha/FreeCodeCamp,Munsterberg/freecodecamp,techstonia/FreeCodeCamp,raisedadead/FreeCodeCamp,BrendanSweeny/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,HKuz/FreeCodeCamp,otavioarc/freeCodeCamp,sakthik26/FreeCodeCamp,1111113j8Pussy420/https-github.com-raisedadead-freeCodeCamp,codeman869/FreeCodeCamp,otavioarc/freeCodeCamp,Munsterberg/freecodecamp,matthew-t-smith/freeCodeCamp,pahosler/freecodecamp,1111113j8Pussy420/https-github.com-raisedadead-freeCodeCamp,DusanSacha/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,tmashuang/FreeCodeCamp,BrendanSweeny/FreeCodeCamp,FreeCodeCampQuito/FreeCodeCamp,no-stack-dub-sack/freeCodeCamp,HKuz/FreeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCampQuito/FreeCodeCamp,MiloATH/FreeCodeCamp,jonathanihm/freeCodeCamp,sakthik26/FreeCodeCamp,TheeMattOliver/FreeCodeCamp,systimotic/FreeCodeCamp,systimotic/FreeCodeCamp,matthew-t-smith/freeCodeCamp,techstonia/FreeCodeCamp,TheeMattOliver/FreeCodeCamp,pahosler/freecodecamp,BhaveshSGupta/FreeCodeCamp,codeman869/FreeCodeCamp,BerkeleyTrue/FreeCodeCamp,MiloATH/FreeCodeCamp,tmashuang/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,jonathanihm/freeCodeCamp,BerkeleyTrue/FreeCodeCamp