v4.0.3

This release improves logs:

• git diff will now stop emitting logs, so that everything is easier to read and won't cause buffer problems (ref issue #27).
• Everything that is supposed to be logged will be: previous versions logged only command outputs and not echo lines. You will now find additional info in the logs.
• To allow you to focus on the most relevant stuff, I grouped everything that only needs to exist to debug the action in a foldable group called "Internal logs".