Highlighting wrong line for unused props, when using TS

[AhmadMayo]

When using lang="ts" on a script tag, an unused prop warning is displayed, but on the line above the on containing said variable, if there's more than one prop. (see images below. the unused variable is "otherVar")

Running svelte-check also reports the wron line

To Reproduce
1- Create a new project and run setupTypescript
2- inside App.svelte, add a new prop

Expected behavior
The yellow line highlighting the position of the unused prop will be correctly placed under the unused one

Screenshots
Using TS:

Not using TS:

System (please complete the following information):

• OS: Ubuntu 20.04
• IDE: VSCode
• Plugin/Package: Svelte for VSCode and svelte-check

[jasonlyu123]

Duplicate of #333