chore(package): update sign-addon to version 0.1.4 (#494)
chore(package): update sign-addon to version 0.1.4 (#494)

https://greenkeeper.io/
kumar303/web-ext,mozilla/web-ext,mozilla/web-ext,rpl/web-ext,kumar303/web-ext,rpl/web-ext,shubheksha/web-ext,shubheksha/web-ext