Updated changelog

Author: eribertomota

ChangeLog

@@ -1,3 +1,23 @@
+OutGuess 0.3
+------------
+2021-08-20 - Joao Eriberto Mota Filho <eriberto@eriberto.pro.br>
+
+   [ Joao Eriberto Mota Filho ]
+
+ - Created CI test for GitHub.
+ - Created CONTRIBUTING file.
+ - Migrated manpage to txt2man.
+ - Moved documents to /doc.
+ - Moved all source code to /src.
+ - Re-made all installation system from zero.
+ - Reviewed and updated README file.
+
+   [ Robin Vobruba ]
+
+ - Added option -h.
+ - Fixed issues with .ppm files.
+ - Lots of changes and important improvements in source code.
+
 OutGuess 0.2.2
 --------------
 2019-01-21 - Joao Eriberto Mota Filho <eriberto@eriberto.pro.br>
@@ -7,6 +27,9 @@ OutGuess 0.2.2
 OutGuess 0.2.1
 --------------
 2018-11-11 - Joao Eriberto Mota Filho <eriberto@eriberto.pro.br>
+
+   [ Joao Eriberto Mota Filho ]
+
  - Added a NEWS file.
  - Fixed an issue in configure.in and allow autoreconf.
  - Fixed some GCC warnings.
@@ -18,7 +41,7 @@ OutGuess 0.2.1
 
    [ Chris Rorvick ]
 
- - Some fixies from Chris Rorvick's GitHub repository[1]:
+ - Some fixes from Chris Rorvick's GitHub repository[1]:
     * Fixed printf format strings.
     * Fixed segfault when encoding PNM images.
     * Pass struct size to memset(), not pointer size.