flaky test in ProjectionTestKitSpec

[pjfanning]

[info] ProjectionTestKitSpec:
[info] ProjectionTestKit
[info] - must assert progress of a projection (506 milliseconds)
[info] - must retry assertion function until it succeeds within a max timeout *** FAILED *** (1 second, 964 milliseconds)
[info]   "1-2-3-4-5[]" was not equal to "1-2-3-4-5[-6]" (ProjectionTestKitSpec.scala:71)
[info]   org.scalatest.exceptions.TestFailedException:
[info]   at org.scalatest.matchers.MatchersHelper$.indicateFailure(MatchersHelper.scala:392)

[ptrdom]

I think bumping the timeout is a good enough solution here - in similar cases the assertions would have passed if they waited for just a little bit more. With the relatively slow GitHub CI machines there is not much else that can be done.

[pjfanning]

#241 merged