consider changing the default value of `--error-reporting`

[Khady]

This is neither a bug report nor really a feature request at this point but more to start a discussion.

It seems that depending on the situation, switching --error-reporting to deterministic would be the expected thing to do. Some things that come to mind:

• CI in which the output can be fairly heavy
• Build of large projects
• Build of tests

There are some other situations during which it probably doesn't make sense. In a tight development loop I usually want to see the error as soon as possible to go back to the code and start a new iteration. But maybe we could assume that in this case --watch should be used.

A possible starting point would be to have deterministic when the environment variable CI is present, which I believe is fairly universal way to detect if some code is running in a CI or not.