chore(package): update mz to version 2.5.0 (#629)
chore(package): update mz to version 2.5.0 (#629)

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