docs: update CHANGELOG

docs: update CHANGELOG

see CHANGELOG 2.4.0

see CHANGELOG 2.3.2

see CHANGELOG 2.3.1

see CHANGELOG 2.3.0

see CHANGELOG 2.2.0

see CHANGELOG 2.1.0

see CHANGELOG 2.0.0

Release 1.3.0

* Using ansible-role for docgen
* Added env, path, run to apps, closes #6
* Updated travis tests