fix: format:eslint remove svelte extensions

[Ancient-Scapes]

Hello, agusID!

I was developing with reference to your repository, but I noticed one problem

It is a bug caused by using eslint-plugin-svelte3 and eslint-plugin-prettier together.

In the current state, if you lint the svelte file, it will break.

For the time being, I tried to remove the svelte file from the format target so as not to brea

sveltejs/svelte#3550

log

boilerplate-svelte on  master is 📦 v1.0.0 via ⬢ v11.2.0 took 5s
➜ yarn format:eslint
yarn run v1.12.3
$ eslint --fix '**/*.{js,ts,svelte}'
ParseError: Expected }
  5 | export let url = ''
  6 |
> 7 | {Router,Link,Route,Home,Explore,url;url=0}
    |                                   ^
Occurred while linting /Users/_user_name_/project/other/boilerplate-svelte/src/App.svelte:3
    at error$1 (/Users/_user_name_/project/other/boilerplate-svelte/node_modules/svelte/compiler.js:13329:20)

[agusID]

Fixed. Thank you so much, @Ancient-Scapes .