chore(package): update coveralls to version 2.11.12 (#394)
chore(package): update coveralls to version 2.11.12 (#394)

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