Enable class/object literal method completions

[zardoy]

vscode reference

An example script, where you can take advantage. Unfortunately I didn't figure out a way to enable object literal method completions in js lang (but in theory it works fine in both).

<script lang="ts">
    import Vue, { defineComponent, Component } from 'vue'
    defineComponent({
        activated // trigger
        activated() {
        
        }
    })
    interface Test {
        callback()
    }
    class TestImpl implements Test {
        callback // trigger
        callback() {
        
        }
    }
</script>

While the first case is useful specifically in vue sfc, second case is still useful when using takeover mode.

I checked this only in VSCode.