Bump jsdom and @vue/cli-plugin-unit-jest in /frontend

Bumps [jsdom](https://github.com/jsdom/jsdom) to 16.7.0 and updates ancestor dependency @vue/cli-plugin-unit-jest. These dependencies need to be updated together.


Updates `jsdom` from 11.12.0 to 16.7.0
- [Release notes](https://github.com/jsdom/jsdom/releases)
- [Changelog](https://github.com/jsdom/jsdom/blob/master/Changelog.md)
- [Commits](jsdom/jsdom@11.12.0...16.7.0)

Updates `@vue/cli-plugin-unit-jest` from 4.5.13 to 5.0.8

---
updated-dependencies:
- dependency-name: jsdom
  dependency-type: indirect
- dependency-name: "@vue/cli-plugin-unit-jest"
  dependency-type: direct:development
...

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