fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-VUE-8219889
- https://snyk.io/vuln/SNYK-JS-VUESERVERRENDERER-8219887
- https://snyk.io/vuln/SNYK-JS-VUETEMPLATECOMPILER-8219888

package.json

@@ -11,7 +11,7 @@
     "generate": "nuxt generate"
   },
   "dependencies": {
-    "nuxt": "^2.0.0",
+    "nuxt": "^3.0.0",
     "bootstrap-vue": "^2.0.0",
     "bootstrap": "^4.1.3",
     "@nuxtjs/axios": "^5.3.6"