Changes for version 0.54
- Objects that stringify no longer warn when used as arguments.
- Using "undef" in the argument list now causes an "uninitialized" warning instead of the custom warnings category.
- Non-numeric values in "allow_exit" now warn in "numeric" category instead of the custom warnings category.
- Various documentation and test updates.
- IPC::Run3::Shell - Perl extension for calling system commands as if they were Perl functions