message: changelog for 1.2.8
diff: # Change Log
  +## [1.2.8](https://github.com/onqtam/doctest/tree/1.2.8) (2018-03-10)
  +[Full Changelog](https://github.com/onqtam/doctest/compare/1.2.7...1.2.8)
  +
  +**Closed issues:**
  +
  +- ARM64 builds: templated\_test\_cases.cpp test fails [\#119](https://github.com/onqtam/doctest/issues/119)
  +- ARM builds: FTBFS on armhf - error: cast from 'const char\*' to 'const [\#118](https://github.com/onqtam/doctest/issues/118)
  +
  ## [1.2.7](https://github.com/onqtam/doctest/tree/1.2.7) (2018-02-06)
  [Full Changelog](https://github.com/onqtam/doctest/compare/1.2.6...1.2.7)
  