⬆️ Bump nuxt from 2.12.2 to 2.13.0

Bumps [nuxt](https://github.com/nuxt/nuxt.js) from 2.12.2 to 2.13.0.
- [Release notes](https://github.com/nuxt/nuxt.js/releases)
- [Changelog](https://github.com/nuxt/nuxt.js/blob/dev/RELEASE_PLAN.md)
- [Commits](https://github.com/nuxt/nuxt.js/compare/v2.12.2...v2.13.0)

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

package.json

@@ -39,7 +39,7 @@
     "firebase": "^7.15.1",
     "graphql": "^15.1.0",
     "graphql-language-service-interface": "^2.4.0",
-    "nuxt": "^2.12.2",
+    "nuxt": "^2.13.0",
     "nuxt-i18n": "^6.12.2",
     "paho-mqtt": "^1.1.0",
     "socket.io-client": "^2.3.0",