Revision history for Perl extension Return::Deep.

1.0     2020.4.4
        First version

1.1     2020.4.4
        Modify documentation

1.2     2020.4.11
        Fix a critical bug on stack manipulation

1.3     2020.4.11
        Introduce `sym_ret'

1.4     2020.4.12
        `ret_bound` with regex. (Perl version 5.10 or later)
        Fix compatibility issues with old versions.

1.5     2020.4.14
        Introduce `deep_wantarray` and `sym_wantarray`.
