ci(travis): adds code coverage check

BREAKING CHANGE: initial release

Author: asciidisco

.travis.yml

@@ -10,7 +10,7 @@ node_js:
 script:
   - npm run commitlint-travis
   - npm run lint
-  - npm run coverage
+  - npm run test-coverage
 after_success:
   - npm run collect-coverage
   - npm run travis-deploy-once "npm run semantic-release"