Disable emojis/colour when CI env var is set

[achingbrain]

CI logging output can be really hard to read:

\x1B[0m\x1B[0m\n'
 \x1B[0m  ping test\x1B[0m\n'
   \x1B[36m  - should listen for ping\x1B[0m\n'

Some CI logging setups handle this well, some do not - the above is a browser test running in a docker image on GitHub CI so I think it's actually Docker which is mangling the output, at any rate it's full of garbage.

It would be better to disable all the fancy formatting when the process.env.CI env var is set. Some runners do this automatically (e.g. mocha) but others don't (playwright?).

[hugomrdias]

which test runner are you using ? can you post a link to that run please

[achingbrain]

They are mocha tests run in a browser via playwright test, running on Docker.

Here's an example run: https://github.com/libp2p/js-libp2p/actions/runs/5465156410/job/14796171888