Type error if using vue-cli without proper webpack config

[ztoben]

You may want to consider updating the readme to cover an error I was running into. Even though it's not caused by this package, it may be helpful for troubleshooting.

I had bootstrapped my project with vue-cli and was seeing this error after adding the createPersistedState to my store:

TypeError: fs.existsSync is not a function at getElectronPath

I believe this is caused by referencing electron outside of the main.js file.

I fixed it by adding this to my vue.config.js in order to set my target properly:

configureWebpack: config => {
  config.target = "electron-renderer";
}

[akodkod]

#44