Bump nuxt from 2.15.7 to 3.1.1

Bumps [nuxt](https://github.com/nuxt/nuxt) from 2.15.7 to 3.1.1.
- [Release notes](https://github.com/nuxt/nuxt/releases)
- [Commits](https://github.com/nuxt/nuxt/compare/v2.15.7...v3.1.1)

---
updated-dependencies:
- dependency-name: nuxt
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -16,7 +16,7 @@
     "dotenv": "^10.0.0",
     "moment": "^2.29.1",
     "node-sass": "^5.0.0",
-    "nuxt": "^2.15.7",
+    "nuxt": "^3.1.1",
     "nuxt-buefy": "^0.3.31",
     "nuxt-shopify": "^1.10.11",
     "sass-loader": "^10.1.1",