[doc] update changelog

Author: simogasp

CHANGES.md

@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [1.0.0] - YYYY-MM-DD
 
  - Support for OpenCV 3.4.9 [PR](https://github.com/alicevision/CCTag/pull/121)
+ - Switch to C++14 standard [PR](https://github.com/alicevision/CCTag/pull/155)
 
 
 ## 2019