Import of PERLANCAR/Sah-0.9.31 from CPAN.

gitpan-cpan-distribution: Sah
gitpan-cpan-version:      0.9.31
gitpan-cpan-path:         PERLANCAR/Sah-0.9.31.tar.gz
gitpan-cpan-author:       PERLANCAR
gitpan-cpan-maturity:     released