Cleanup tsconfig.json

[PDDStudio]

There's a lot of things to improve in tsconfig.json.
A lot of the current properties should not be needed and can be removed.
Also there might be new flags which the current tsconfig is not aware of.

[PDDStudio]

Minimum runtime requirements:

• Supported Platform: Node v10+ later

Possible improvements:

• better shrinking to reduce file size (?)
• automatic imports should be relative starting from within src