version 0.004; 2013-08-26
  * bugfix: require bugfixed version of Attribute::Lexical (for not
    exposing [perl #73174] prior to Perl 5.11)
  * bugfix: require bugfixed version of Sub::Mutate (for not crashing
    in an edge case)
  * update for Perl 5.15.3, where padlists are now AvREAL
  * update for Perl 5.17.4's new pad API
  * update for Perl 5.19.3's tracking of the last named item in a pad
  * port to FreeBSD's mutant Perl 5.8 which has the defined-or operator
  * include META.json in distribution
  * convert .cvsignore to .gitignore
  * add MYMETA.json to .gitignore
version 0.003; 2010-11-21
  * bugfix: on Perl 5.13.3 and above, maintain CvSTASH backrefences
    correctly
  * include a reserve implementation of the ptr_table data structure,
    because prior to Perls 5.9.5 and 5.8.9 it was not made available by
    the core if Perl is not configured for ithreads
version 0.002; 2010-10-24
  * bugfix: when applying a filter to a Perl sub, avoid letting the core
    munge entersub ops, which was causing allocation of target slots in
    the wrong pad
  * bugfix: on Perl 5.13.3+, correctly manage the CVf_CVGV_RC flag when
    applying a filter to an xsub
  * bugfix: correctly maintain PL_sv_objcount when applying a filter to
    a blessed xsub
  * bugfix: require bugfixed version of Sub::Mutate (for PL_sv_objcount
    correctness)
  * in XS, factor out Perl version variations into macros for greater
    readability
  * give the internal function _test_xs() a prototype
  * in XS, declare "PROTOTYPES: DISABLE" to prevent automatic generation
    of unintended prototypes
  * jump through hoops to avoid compiler warnings
  * use full stricture in test suite
  * in Build.PL, complete declaration of configure-time requirements
version 0.001; 2010-07-20
  * bugfix: in XS, check SvOBJECT before looking at SvSTASH, because
    the latter isn't guaranteed to be meaningful otherwise
  * bugfix: require bugfixed version of Sub::Mutate (for SvSTASH safety)
  * bugfix: require bugfixed version of Attribute::Lexical (for
    passing package through to required code in pure-Perl version of
    Lexical::SealRequireHints)
  * port to Perl 5.13.3: use CvGV_set()
  * in XS, use PERL_NO_GET_CONTEXT for efficiency
  * check for required Perl version at runtime
  * in Build.PL, explicitly declare configure-time requirements
  * remove bogus "exit 0" from Build.PL
  * add MYMETA.yml to .cvsignore
version 0.000; 2009-08-28
  * initial released version