Package test fails on Julia 1.2 branch

[KristofferC]

This package was noted to fail when running the tests for all registered package for the Julia 1.2 release. The likely cause is the changes to the function Base.close_chnl_on_taskdone in JuliaLang/julia#31673. This function is not really a part of the official exposed interface so it is likely that the package here need to change to accommodate those changes.

[baggepinnen]

That's alright, thanks for the heads up!