Fix process leak on Supervisor with StarterProcess (DPP-84)#77

tavisrudd wants to merge 2 commits intohaskell-distributed:developmenthaskell-distributed/distributed-process-platform:developmentfrom

BirdseyeSoftware:fix-dpp-84-restarter-process-leakBirdseyeSoftware/distributed-process-platform:fix-dpp-84-restarter-process-leakCopy head branch name to clipboard