Report test pass/fail when a test file finishes instead of the entire suite

[icorbrey]

Essentially what I'd like is to be able to see the results of test files when they finish testing rather than when the entire test suite finishes. This would be especially helpful on slow test suites (our tests finish in 15 minutes) in scenarios where the Smart Start option is not suitable (for example, making console.warn and console.error throw instead and seeing which tests need to be fixed).

[smcenlly]

Our team has discussed this in the past, and we like the idea.

To provide this functionality, there are some major architectural changes required to Wallaby. We'll consider in our future planning.