v2.0.0-rc.4 - Switch to electron-devtools-installer

From now on, whenever you add this plugin to your project, electron-devtools-installer will be used instead of the provided installVueDevtools function. This function was based off of electron-devtools-installer but with some fixes. These fixes have since been merged into electron-devtools-installer (as well as new features like electron v9 support). It is recommended that you switch to electron-devtools-installer as the installVueDevtools function will be removed in the 2.0.0 final release. To do so, edit your background.(js|ts):

import {
  createProtocol,
- installVueDevtools
} from 'vue-cli-plugin-electron-builder/lib'
+ import installExtension, { VUEJS_DEVTOOLS } from 'electron-devtools-installer'

... (around line 77)

-await installVueDevtools()
+await installExtension(VUEJS_DEVTOOLS)

And then run npm i -D electron-devtools-installer/yarn add -D electron-devtools-installer.