Log Message:
Update to 2.22

Upstream changes:
2.22      2015-12-05 11:08:20+13:00 Pacific/Auckland
  - POD fix in link to package XML::SAX::ParseFactory (from Mohammad S Anwar)
  - allow subclass to override attribute escaping (from Christopher Masto)
  - POD fix adding NAME section to FAQ (RT#110080 from Bart Martens & gregor
    herrmann of the Debian project)
  - POD typo fix (RT#110082 from gregor herrmann of the Debian project)
  - fix reference comparison operator used in checking for circular data
    structures (RT#89553 from Laurent Dami)
  - add better diagnostics from file handling code in test suite

2.21      2015-12-04 16:33:49+13:00 Pacific/Auckland
  - Improved diagnostics - xml_in() will now catch parse exceptions and add
    caller information via Carp::croak
  - Switch to use lexical warnings (suppress with either 'no warnings;' or
    'no warnings "XML::Simple";', rather than $^W = 0)
  - POD fixes (from David Steinbrunner)
  - Regex escaping fixes for Perl 5.22+ (from Kent Fredric)
  - Add workaround for test failures on RHEL/CentOS 6.5 (RT#102115 from
    Chris Drake, workaround from Tim Bunce)
  - Remove some 'eval' calls from test suite which could mask root cause of
    test failures
  - Make each test script use unique filenames to allow tests to be run in
    parallel (RT#101362 from Karen Etheridge & Kent Fredric)
  - POD update: mention XML::Twig in 'STATUS' section (RT#79228 from Matt Trout)