js client npm: upgrade jest

[krivard]

closes 2 open dependabot alerts on src/client/packaging/npm/package-lock.json:

• set-value
• ansi-regex

Prerequisites:

• Unless it is a documentation hotfix it should be merged against the dev branch
• Branch is up-to-date with the branch to be merged with, i.e. dev
• Build is successful
• Code is cleaned up and formatted

Summary

Dependabot couldn't figure this one out on its own, but setting devDependencies.jest to ^27 seems to build okay with

$ npm ci
$ npm test
$ npm pack

(which I pulled out of the release workflow; I don't actually know what I'm doing in npm)

[sgratzl]

👍

since we don't use any plugins an upgrade of jest should be fine