Checklist

• I have tried restarting my IDE and the issue persists.
• I have read the FAQ and my problem is not listed.

Tell us about your environment

• ESLint version: 7.17.0
• eslint-plugin-vue version: 7.0.0-0
• Node version: 14.11.0
• Operating System: Ubuntu 18.04

Please show your full configuration:

Configuration inside package.json, just the defaults for Vue 3 + CLI

{
  "eslintConfig": {
    "root": true,
    "env": {
      "node": true
    },
    "extends": [
      "plugin:vue/vue3-essential",
      "eslint:recommended"
    ],
    "parserOptions": {
      "parser": "babel-eslint"
    },
    "rules": {}
  }
}

What did you do?

<script>
import { ref, reactive, defineComponent } from 'vue';

export default defineComponent({
  // other options
  setup () {
    const u = ref(10);
    const v = ref(20);
    const obj = reactive({ u, v });
    
    obj.u = v; // This line causes the bug
  }
})
</script>

What did you expect to happen?
According to the Vue docs, on the topic "Access in Reactive Objects", "if a new ref is assigned to a property linked to an existing ref, it will replace the old ref", and there's this example

const count = ref(0)
const state = reactive({
  count
})

console.log(state.count) // 0

state.count = 1
console.log(count.value) // 1

const otherCount = ref(2)

state.count = otherCount
console.log(state.count) // 2
console.log(count.value) // 1

So, ESLint shouldn't complain about the assignment obj.u = v.

What actually happened?
ESLint throws this

62:17  error  Must use `.value` to read or write the value wrapped by `ref()`  vue/no-ref-as-operand

✖ 1 problem (1 error, 0 warnings)


 @ ./node_modules/cache-loader/dist/cjs.js??ref--12-0!./node_modules/babel-loader/lib!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader-v16/dist??ref--0-1!./src/App.vue?vue&type=script&lang=js 1:0-37 5:10-14
 @ ./src/App.vue?vue&type=script&lang=js
 @ ./src/App.vue
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://192.168.0.97:8080&sockPath=/sockjs-node (webpack)/hot/dev-server.js ./src/main.js

It's not ideal to assign obj.u = v.value since it will cause the loss of the reactivity link from the ref to the reactive object.

Repository to reproduce this issue

Copying the code provided here in an existent Vue project should be enough to reproduce this one.