added nightly to the travis.yml

Author: stevleibelt

.travis.yml

@@ -3,6 +3,7 @@ php:
   - 7.0
   - 7.1
   - 7.2
+  - nightly
 before_script:
   - echo 'date.timezone = "Europe/Berlin"' >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
   - phpenv rehash

CHANGELOG.md

@@ -19,6 +19,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Added
 
+* added nightly to the travis.yml
+
 ### Changeed
 
 ## [2.0.0](https://github.com/bazzline/php_component_cli_argument/tree/2.0.0) - released at 2018-01-12