chore(package): update react-helmet to version 3.2.2
chore(package): update react-helmet to version 3.2.2

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