["security-issue"] dependency issue with mimitest

[MooseQuest]

Description:

Reported by dependabot: https://github.com/CodeForPhilly/chime/network/alert/e2e/package-lock.json/minimist/open

Steps to reproduce:

Checked in Code: https://github.com/CodeForPhilly/chime/blame/develop/e2e/package-lock.json

[rcknplyr]

@lottspot, @MooseQuest, @themightychris,
Could one of you advise how critical this is, and if we need this resolved in this repo?
Thanks