chore(package): update node-sass to version 4.5.2 (#2202)
chore(package): update node-sass to version 4.5.2 (#2202)

https://greenkeeper.io/
kumar303/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,aviarypl/mozilla-l10n-addons-frontend,tsl143/addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,kumar303/addons-frontend,tsl143/addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend