Bump vite from 2.9.14 to 2.9.16 in /demo (#480)

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) from 2.9.14 to 2.9.16.
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/v2.9.16/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v2.9.16/packages/vite)

---
updated-dependencies:
- dependency-name: vite
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

demo/package.json

@@ -30,7 +30,7 @@
 		"eslint-plugin-vue": "8.0.3",
 		"node-sass": "8.0.0",
 		"sass": "1.56.1",
-		"vite": "2.9.14",
+		"vite": "2.9.16",
 		"vue-loader": "16.8.3"
 	}
 }