fix(package): update git-rev-sync to version 1.9.0 (#880)
fix(package): update git-rev-sync to version 1.9.0 (#880)

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