chore(deps): bump @vue/theme from 2.2.12 to 2.3.0 (#45)

Bumps [@vue/theme](https://github.com/vuejs/theme) from 2.2.12 to 2.3.0.
- [Commits](vuejs/theme@v2.2.12...v2.3.0)

---
updated-dependencies:
- dependency-name: "@vue/theme"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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