chore: adapt to latest semantic-release

Author: boennemann

.travis.yml

@@ -8,14 +8,10 @@ notifications:
 node_js:
   - 6
   - 4
-  - '0.12'
 before_script:
   - npm prune
 after_success:
-  - 'curl -Lo travis_after_all.py https://git.io/travis_after_all'
-  - python travis_after_all.py
-  - 'export $(cat .to_export_back) &> /dev/null'
-  - npm run semantic-release
+ - npm run semantic-release
 branches:
   except:
     - "/^v\\d+\\.\\d+\\.\\d+$/"