Bump @vuepress/theme-default from 2.0.0-rc.115 to 2.0.0-rc.118

Bumps [@vuepress/theme-default](https://github.com/vuejs/vuepress/tree/HEAD/packages/@vuepress/theme-default) from 2.0.0-rc.115 to 2.0.0-rc.118.
- [Release notes](https://github.com/vuejs/vuepress/releases)
- [Changelog](https://github.com/vuejs/vuepress/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vuepress/commits/HEAD/packages/@vuepress/theme-default)

---
updated-dependencies:
- dependency-name: "@vuepress/theme-default"
  dependency-version: 2.0.0-rc.118
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]