0.02 2022-09-22
  [Document Improvement]
    * Add author and repository and copyright.
    * Add the headding "Subroutine Signatures Support".
  [Bug Fix]
    * Fix the bug that Class::Plain can't be compiled on Windows.
  [Test Fix]
    * Fix the testing bug that the method tests failed on Perl 5.16.
      This was because Perl 5.16 doesn't have experimental.pm.
    * Tests of subroutine signatures are enable only in Perl 5.26+.
  [Test Improvemetn]
    * Add tests using Github Action for Linux, Mac, Windows.
  [Prerequirement Change]
    * This module doesn't depend on Test::Refcount.
  [Internal Changes]
    * Remove the following options from Module::Build->new.
      create_license => 1,
      create_readme  => 1,

0.01 2022-09-22
  * First release.