Added no-deprecated-vue-extend rule.

[madogiwa0124]

Vue.extend is removed in Vue.js 3.0.0+.

Vue.extend Removed
https://v3-migration.vuejs.org/breaking-changes/global-api.html#vue-extend-removed

This rule checks for disallow using deprecated Vue.extend.

[ota-meshi]

Thank you for opening the PR.

I'm not sure people should check it. I think we no longer use the Vue identifier when building applications with Vue3. I think it can be checked by just checking the default exports.

     "no-restricted-imports": [
       "error",
       {
         "paths": [
           {
             "name": "vue",
             "importNames": ["default"]
           },
         ],
       },
     ],

[madogiwa0124]

@ota-meshi

Indeed. I had not thought of that ! That seems like a good way to do it 👍🏻

Thanks for the review 😄