chore(deps): update mattermost package dependencies #880

Job	Run time
validate (install, registry1) / run	1s
validate (install, unicorn) / run	1s
validate (install, upstream) / run	1s
validate (upgrade, registry1) / run	1s
validate (upgrade, unicorn) / run	1s
validate (upgrade, upstream) / run	1s
	6s

Provide feedback