update changelog for npm@2.7.0
update changelog for npm@2.7.0

midniteio/npm,evocateur/npm,cchamberlain/npm-msys2,princeofdarkness76/npm,haggholm/npm,midniteio/npm,TimeToogo/npm,thomblake/npm,Volune/npm,xalopp/npm,chadnickbok/npm,yodeyer/npm,chadnickbok/npm,cchamberlain/npm,kemitchell/npm,rsp/npm,cchamberlain/npm,TimeToogo/npm,segrey/npm,evocateur/npm,DaveEmmerson/npm,kimshinelove/naver-npm,TimeToogo/npm,lxe/npm,kemitchell/npm,evanlucas/npm,kimshinelove/naver-npm,cchamberlain/npm-msys2,rsp/npm,evocateur/npm,misterbyrne/npm,yodeyer/npm,xalopp/npm,chadnickbok/npm,lxe/npm,ekmartin/npm,cchamberlain/npm-msys2,yibn2008/npm,yibn2008/npm,midniteio/npm,DIREKTSPEED-LTD/npm,cchamberlain/npm,misterbyrne/npm,ekmartin/npm,yibn2008/npm,rsp/npm,ekmartin/npm,DIREKTSPEED-LTD/npm,segrey/npm,DaveEmmerson/npm,haggholm/npm,thomblake/npm,kemitchell/npm,DaveEmmerson/npm,lxe/npm,princeofdarkness76/npm,kimshinelove/naver-npm,yodeyer/npm,princeofdarkness76/npm,DIREKTSPEED-LTD/npm,thomblake/npm,evanlucas/npm,xalopp/npm,segrey/npm,misterbyrne/npm,evanlucas/npm,Volune/npm,Volune/npm,haggholm/npm