Update to 1.48

Upstream changes:
1.48    - 2022-05-24, H.Merijn Brand
    * It's 2022
    * Update to Devel::PPPort-3.64
    * kh => 1 (use internal headers)
    * Update to Devel::PPPort-3.67
    * Add constants for META flags (RT#142508)
    * Update to Devel::PPPort-3.68
    * Export :CONSTANTS
    * Fix sep_set typo (issue 37)
    * Tested against perl-5.36.0

1.47    - 2021-12-21, H.Merijn Brand
    * Make error 2014 catchable
    * Suppress empty lines on empty input (issue 34)
    * Perl 6 -> Raku in docs (RT#136864)
    * IETF changed their URLs
    * Update to Devel::PPPort-3.63
    * Add some documentation for Google hist (Nigel)

(wen)