ScalaTest CatsResource hangs on Resource acquisition failure

[bpholt]

This appears to be similar to the issue I fixed in #608 for Specs2. Consider a test like this:

class CatsResourceErrorSpecs extends FixtureAsyncWordSpec with CatsResourceIO[Int]  {
  override val resource: Resource[IO, Int] =
    IO.raiseError(new RuntimeException("boom")).toResource

  "cats resource specifications" should {
    "report errors in resource acquisition" in { i =>
      fail(s"should not get here, but received $i")
    }
  }
}

Currently, ScalaTest / cats-effect-testing will not report the RuntimeException; it will manifest as a timeout if ResourceTimeout is finite.

I'm working on a fix.