Bump vite from 2.8.0 to 2.9.18 in /test

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) from 2.8.0 to 2.9.18.
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/v2.9.18/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v2.9.18/packages/vite)

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

Signed-off-by: dependabot[bot] <[email protected]>

test/package.json

@@ -6,6 +6,6 @@
     "webpack": "4.44.2",
     "webpack-cli": "3.3.12",
     "snowpack": "2.12.1",
-    "vite": "2.8.0"
+    "vite": "2.9.18"
   }
 }