New: add no-use-computed-property-like-method rules

[tyankatsu0105]

close #928

This PR adds vue/no-use-computed-property-like-method rule.
https://deploy-preview-1234--eslint-plugin-vue.netlify.app/rules/no-use-computed-property-like-method.html

[tyankatsu0105]

Sorry for my slow work😭

[tyankatsu0105]

@ota-meshi
Probably, I can use executeOnVue for this rule, right?
Sorry, please ignore

[ota-meshi]

Sorry for the late reply. I posted some comments.

[ota-meshi]

I have found an error in some cases. Could you add the following test cases?

<script>
export default {
  computed: {
    bar() {
      return
    }
  }
}
</script>

<script>
export default {
  methods: {
    fn() {
      this.foo()
    }
  }
}
</script>

[tyankatsu0105]

Thanks!
I'll do that :)

[tyankatsu0105]

@ota-meshi
I changed some codes to support the above cases.
3b77c4e
ce93fa6

However, I will not support this case:

<script>
export default {
  methods: {
    fn() {
      this.foo()
    }
  }
}
</script>

Because this rule only checkes whether computed properties are expected as property or not.
In this case, computed is not used.

[ota-meshi]

I don't want support. I've found that using a rule in that source code reports a crash or an incorrect error, so I just want to add test cases to tests if it's okay.

[tyankatsu0105]

Thanks.
I just make sense of what you said :)
I added test case
7cb18fe

[ota-meshi]

Looks good to me! Thank you!