version 0.2.6+3

Author: rultor

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- adhere to [PDD](https://www.yegor256.com/2010/03/04/pdd.html) (Puzzle Driven Development) 
 
 ## [0.2.6+2] - 2021-05-01
 ### Fixed