0.020   2016-05-02
        * Work on Perl 5.22 and above with -DPERL_OP_PARENT.
          (Aaron Crane)
        * Verify number of arguments. (Aaron Crane)

0.011   2016-04-29
        * Update README.

0.010   2016-04-29
        * Add is_plain_* functions to support explicitly non-blessed
          variations of the functions. (Aaron Crane)
        * Add is_blessed* functions to support explicitly blessed
          variations of the functions. (Aaron Crane)
        * Support blessed and magical regexes in 5.10+. From the
          implementation perspective, we're now using SvRXOK() on
          Perl 5.10+ (both opcode and XS) because it's more correct.
          (Sawyer X, Aaron Crane)

0.008   2016-01-23
        * Document is_ref() in the POD (GH #8).

0.007   2016-01-09
        * Add is_ref(), asked by Ilmari (GH #6).
          (Tested on 5.18.2, 5.10.1, 5.8.9, 5.6.2)
        * Clarify tied variables support (or lack thereof).

0.006   2016-01-01
        * Update changelog for 0.005 (5.10.1 tested successfully).
        * Add license metadata. Thanks, Manwar!
        * Rephrase croak message for is_formatref on 5.6.

0.005   2015-12-28
        * Support for 5.10. (Tested on 5.10.1)
        * Support for 5.8. (Tested on 5.8.9)
        * Support for 5.6, except for is_formatref. (Tested on 5.6.2)
        * Support older Test::More versions.
        * Provide metadata to direct people to Github instead of RT.
          (Thanks, Graham Ollis!)
        * Clarify Readonly, tied variables, and magic.
        * Cleaned up docs a bit.

0.004   2015-12-18
        * Add is_refref() function!
        * Mention and compare to Scalar::Util::reftype.
        * Add benchmark results, including against reftype.
        * Add a note about the nature of playing with op trees, sort of.
        * Add a note on what functions from reftype() are not available.
        * Clarify how bad overloading is. No, it's not duck-typing either.

0.003   2015-12-17
        * Clarify overloading approach. Sorry, everyone!
        * Document :all option.

0.002   2015-12-05
        * Ugh PAUSE. Thanks, Graham Barr.

0.001   2015-12-04
        * First version