0.04 2022-09-16
  [Test Improvement]
    * Add many tests.
  [Bug Fix]
    * Fix the bug that the l method in the Sys::FileTest class doesn't work well.
  [Prerequirement Changes]
    * Need SPVM::Errno 0.06+.
    
0.03 2022-09-15
  [New Features]
    * Add the getcwd method to the Sys::IO class.
    
      static method getcwd : mutable string ($buf : mutable string, $size : int);
      static method realpath : mutable string ($path : string, $resolved_path : mutable string);
      static method _getdcwd : mutable string ($drive : int, $buffer : mutable string, $maxlen : int);
    
    * Add the following methods to the Sys class.
    
      static method getenv : string ($name : string);
      static method setenv : int ($name : string, $value : string, $overwrite : int);
      static method unsetenv : int ($name : string);
    
      
  [Incompatible Changes]
    * Change the definition of the following method in the Sys::IO class.
      [Before]
        static method fwrite : int ($buffer : mutable string, $size : int, $data_length : int, $stream : Sys::IO::FileStream);
      [After]
        static method fwrite : int ($ptr : string, $size : int, $nmemb : int, $stream : Sys::IO::FileStream);
    * Change the definition of the following method in the Sys::IO class.
      [Before]
        static method truncate : long ($path : string, $offset : long);
      [After]
        static method truncate : int ($path : string, $length : long);
  [Bug Fix]
    * Fix the bug that lseek return value is wrong.
    * Fix the bug that truncate return value is wrong.
    * Fix the bug that the length argument of the truncate method in the Sys::IO class is int, not long.
  [Test Improvement]
    * Add many tests.
  [Test Fix]
    * Fix Github Action Windows 2019 test by adding ".gitattribute"
    
      # All files are binary files. CRLF is always CRLF. LF is always LF.
      * -text
    * Fix reference count tests.
    
  [Document Improvement]
    * Add the link to this repository.
0.02 2022-09-14
  [Document Improvement]
    * Add Sys::FileTest doc.
  [Incompatible Changes]
    * Remove Sys::IO->freopen.
    * Simplify the implementation of the methods for file test in Sys::FileTest
      If the file doesn't exists, an exception will be thrown except for e.

  [Changes]
    * Use access function for Sys::FileTest->e.
  [Bug Fix]
    * Fix the bug that ouble free or corruption (!prev) occur in Sys::IO->stat in Linux/Ubuntu 32bit.
0.01 2022-09-13
  
  * First experimental release