chore: workaround to trigger the npm publication in ci pipeline

Author: UlisesGascon

.travis.yml

@@ -1,3 +1,8 @@
+# whitelist
+branches:
+  only:
+    - master
+
 language: node_js
 node_js:
   - 10
@@ -15,5 +20,3 @@ jobs:
       skip_cleanup: true
       email: "$NPM_EMAIL"
       api_key: "$NPM_TOKEN"
-      on:
-        tags: true