PSA: Test suite output is now quiet by default

[Sam Clegg]

I've recently landed a change to make the output of the test suite very minimal by default.

It uses ANSI codes to update just a single line of your terminal and hides all stderr and stdout produced by the test by default. Personally I think it makes the output much more manageable and useful.

If a given test fails you will still see the stdout / stderr / exception.

If you prefer the old behavior can just add `-v/--verbose`

cheers,

sam