fix npm prepublish issue

.travis.yml

@@ -38,12 +38,6 @@ deploy:
     on:
       branch: master
       condition: $JOB != e2e
-  - skip_cleanup: true
-    provider: script
-    script: npm run branch-release
-    on:
-      branch: master
-      condition: $JOB != e2e
   - provider: npm
     skip_cleanup: true
     email: gotsijroman@gmail.com
@@ -51,3 +45,9 @@ deploy:
       secure: 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
     on:
       tags: true
+  - skip_cleanup: true
+    provider: script
+    script: npm run branch-release
+    on:
+      branch: master
+      condition: $JOB != e2e

package.json

@@ -9,7 +9,6 @@
   "main": "dist/redoc.min.js",
   "scripts": {
     "test": "gulp lint && ./build/run_tests.sh",
-    "prepublish": "gulp build",
     "jspm-install": "jspm install",
     "start": "gulp serve",
     "build-dist": "gulp build",