Air randomly outputs same thing on either stout and stderr

[pancsta]

Ran into a problem with a json formatter not always formatting air's output, turns out air sometimes outputs on stderr instead of stdout.

• workaround air 2>&1 | fblog
• source ticket and repro steps here https://github.com/brocode/fblog/issues/115

[vermacodes]

I ran into same issue when trying to format logs with jq.

• air | jq -R 'try fromjson catch .': Some logs are going to stderr and are not processed by jq.
• air 2>&1 | jq -R 'try fromjson catch .': Works as expected.

Tested without using air to ensure that this problem is introduced by air.