Update p5-Shell-Perl to 0.0022.

Changes from previous:
----------------------
0.0022  Mar 12, 2011
        - no real change
        - Fix test again for 5.6 sake
        - Improved Makefile.PL / META.yml

0.0021  Mar 12, 2011
        - no real change
        - New test fix for happy 5.6 testing

0.0020  Mar 10, 2011
        - no real change
        - Test fixes for keeping 5.6 happy

0.0019  Mar 9, 2011
        - Dumper updated to work with Data::Dump 1.16+

(hiramatsu)