- ignore File::Spec - it's tricky

- updated to 1.220
see /usr/share/doc/packages/perl-PPI/Changes
1.220 Tue 11 Nov 2014
Summary:
- incompatible behavior fixes on PPI::Statement::Sub->prototype
- improved parsing of various syntax elements
- code quality improvements
- various small documentation fixes

Details:
- {} is now recognized as anonymous hash constructor instead of a code
block after these operators: &&= //= || && // ? :
(GitHub #36) (MOREGAN)
- regex capture variables greater than $9 are now parsed completely,
instead of being parsed as single digit captures with numbers after
them (GitHub #38) (MOREGAN)
- DESTROY and AUTOLOAD subs are now parsed even without the sub
keyword (GitHub #39) (MOREGAN)
- PPI::Statement::Sub->prototype behavior now matches its
documentation, instead of returning the prototype string
unchanged and still including the parens (GitHub #56) (MOREGAN)
- PPI::Statement::Sub->prototype now returns undef on subs without a
prototype, instead of returning an empty string
(GitHub #56) (MOREGAN)
- list of keywords which are not parsed as packages when followed by
the Perl4 package separator ' has been increased
(GitHub #77) (MOREGAN)
- application of a number of Perl::Critic policies and documentation