We need to scan dependencies of dashiki and wikistats and any other projects that use npm/yarn. We need to do this periodically or maybe even with Jenkins when we build/verify.
For example, we could simply run npm audit: https://docs.npmjs.com/getting-started/running-a-security-audit
Update: it turns out this is very easy, see Lego's comment below, we just have to file a bug in Continuous-Integration-Config to add npm audit to our repos.