Upgrading to vue-cli 4 and electron 8

[mszkb]

According to: #94

What I have done:
Complete revamp of folder structure

• upgrading vue-cli 4
• use vue-cli-plugin-electron-builder for project scaffolding
• upgrading to electron 8
• upgrading to spectron 10
• use jest instead of karma, mocha and chai
• moving configurations into vue.config.js
• upgrading to prettier 2

We do not need following files/directories anymore, because they are managed by vue-cli-plugin-electron-builder:

• .electron-vue build files
• Karma tests
• seperate renderer and main folders in src

I left the code as it was before. There is a new version to prettier and I applied the codestyling.

[mszkb]

Sadly it is pretty hard to check what I have done to the sourcecode itself because I moved everything into the src/ folder instead splitting up into main and renderer.

[lauthieb]

Thank you very much @mszkb. I will check this in the following days.

[lauthieb]

@mszkb sorry I don't have time for now :'(
I will check that max on Saturday. Thanks a lot.

[lauthieb]

Wow amazing work.
All scripts works well. Thanks again @mszkb!

[lauthieb]

@mszkb there's a problem...
When I did npm run build:mac and installed with the new 1.2.4 dmg file, I've lost all my notes. Fortunately, when I reinstall the 1.2.3 version my notes come back.
Can you please check this problem?
I will let your commit on master but don't make a release until this work again.
Thanks!

[mszkb]

I try to replicate and fix this problem on my machine over the weekend :)

[lauthieb]

Thanks a lot.