0.04 2020-11-15
- NOTE: there are backward incompatible changes to the API in this release
- New: importable convenience constructor spawn()
- New: importable process_group() to process a combined queue of messages for a
  group of related processes
- Removes args constructor parameter; instead, cmd accepts either a complete
  command string or an array ref of the command and its arguments
- Removes IPC::Simple->async; it was unreliable and of dubious value

0.03 2020-11-10
- Drop pretense of win32 support
- Messages are now sent asynchronously

0.02 2020-04-27
- Bugfix: use `eol` setting in reads

0.01 2020-04-27
- Initial release