Bump @vuepress/plugin-register-components

Bumps [@vuepress/plugin-register-components](https://github.com/vuejs/vuepress/tree/HEAD/packages/@vuepress/plugin-register-components) from 2.0.0-beta.49 to 2.0.0-rc.0.
- [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/plugin-register-components)

---
updated-dependencies:
- dependency-name: "@vuepress/plugin-register-components"
  dependency-version: 2.0.0-rc.0
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -20,6 +20,6 @@
     "vuepress-plugin-use-pages": "^1.0.5"
   },
   "dependencies": {
-    "@vuepress/plugin-register-components": "^2.0.0-beta.49"
+    "@vuepress/plugin-register-components": "^2.0.0-rc.0"
   }
 }