Bump http-proxy-middleware and @vue/cli-service

Bumps [http-proxy-middleware](https://github.com/chimurai/http-proxy-middleware) to 2.0.9 and updates ancestor dependency [@vue/cli-service](https://github.com/vuejs/vue-cli/tree/HEAD/packages/@vue/cli-service). These dependencies need to be updated together.


Updates `http-proxy-middleware` from 2.0.6 to 2.0.9
- [Release notes](https://github.com/chimurai/http-proxy-middleware/releases)
- [Changelog](https://github.com/chimurai/http-proxy-middleware/blob/v2.0.9/CHANGELOG.md)
- [Commits](chimurai/http-proxy-middleware@v2.0.6...v2.0.9)

Updates `@vue/cli-service` from 4.5.19 to 5.0.8
- [Release notes](https://github.com/vuejs/vue-cli/releases)
- [Changelog](https://github.com/vuejs/vue-cli/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vue-cli/commits/v5.0.8/packages/@vue/cli-service)

---
updated-dependencies:
- dependency-name: http-proxy-middleware
  dependency-version: 2.0.9
  dependency-type: indirect
- dependency-name: "@vue/cli-service"
  dependency-version: 5.0.8
  dependency-type: direct:production
...

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Author: dependabot[bot]