PSA: Upcoming large code updates in Core

[nytamin]

This is a PSA about a fairly large upcoming code-change that are planned for Core.

Code formatting
PR: #146
We will start using Prettier as code formatter for the project.

This will result in a lot of code that will be changed (formatted differently), which might affect how easy it is to make PR:s and commits from external repos.
It is therefore recommended that any contributions made by external contributors be presented at the latest 2020-02-10.
The Code formatting will be applied 2020-02-18, so expect to have to rebase any changes done after that.

Note: The formatting have not been applied yet, we're wrapping some things internally and hope to get around to it asap.

[Julusian]

#240