Update to 1.849
    
    - New upstream release 1.849
      - Fixed edge case in MCE::Hobo when reaping inside a signal handler
      - Guard clean-up code in MCE::Shared::Server during global destruction
      - Configured extra data channel used for reaping Hobos and exporting
      - Optimized reaping in MCE::Hobo when void_context is set
      - Added list_pids class method to MCE::Hobo
      - Added pid class method to MCE::Shared
      - Bumped MCE dependency to 1.849