World age problems when using @everywhere in a function

Add timeout parameter to addprocs function

printing of worker information not correct

SharedArrays not found in multiple workers

Test failed when running with MMTk

Move away from using sticky tasks to avoid races (`@async` -> `@spawn`)

Flaky test when multithreading

Handle multiple workers added on a node with the bind port specified

CI failure when testing sending arrays

Instructions for using development version of the package in the README