make argument textobj work in { ... }

[singlexyz]

It's super usefull for javascript like language.
like json, import...

import React, { useState, useContext } from 'react'

{ a: 10, React }

[gaving]

This would be a nice default I think!

[tim-hilt]

Doesn't work for me though. It messes up more than the original version does