test: add commit completity test in ci (#205)

Author: AllanZhengYP

.travis.yml

@@ -6,3 +6,6 @@ install:
   - npm run bootstrap
 script:
   - npm run test
+  - echo "test if pull request is completed"
+  - node scripts/rebuildClients.js
+  - git status | grep -q "working tree clean"