`vue invoke` makes logo.png blank

[elevatebart]

Version

3.0.0-beta.6

Reproduction link

https://github.com/elevatebart/vuecliinvoke

Steps to reproduce

1. vue create my-app
2. vue add @vue/cli-plugin-typescript
3. look at the file src/assets/logo.png

What is expected?

This file should contain the vue logo.

What is actually happening?

File seems corrupted.

[elevatebart]

It seems to be an encoding issue in the invoke file.
No need to specify utf-8 if loading a png file.
packages/@vue/cli/lib/invoke.js--30

res[file] = fs.readFileSync(path.resolve(context, file), 'utf-8')

I will cook up a quick pull-request.

[elevatebart]

The pull request is ready ;)

#1038