fix: ensure semantic release script is called

Author: jimlambie

.travis.yml

@@ -13,6 +13,8 @@ before_install:
   - if [[ `npm -v` != 3* ]]; then npm i -g npm@latest; fi
 before_script:
   - npm prune
+after_success:
+  - npm run semantic-release
 branches:
   except:
     - /^v\d+\.\d+\.\d+$/