ci(travis): run commitlint first in script

Author: remarkablemark

.travis.yml

@@ -1,18 +1,19 @@
 language: node_js
 node_js:
-- stable
+  - stable
 install:
-- npm install
+  - npm install
 script:
-- npm run lint
-- npm run dtslint
-- npm run cover
-- npm run build
-- npm run benchmark
+  - npx commitlint -e
+  - npm run lint
+  - npm run dtslint
+  - npm run cover
+  - npm run build
+  - npm run benchmark
 after_script:
-- npm run coveralls
+  - npm run coveralls
 cache:
   directories:
-  - node_modules
+    - node_modules
 notifications:
   email: false