Bump xml2js from 0.4.19 to 0.5.0 in /frontend (#48)

Bumps [xml2js](https://github.com/Leonidas-from-XIV/node-xml2js) from 0.4.19 to 0.5.0.
- [Commits](https://github.com/Leonidas-from-XIV/node-xml2js/compare/0.4.19...0.5.0

)

---
updated-dependencies:
- dependency-name: xml2js
  dependency-type: indirect
...

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