fix(travis): Push bootstrapping later

Author: bebraw

.travis.yml

@@ -2,8 +2,6 @@ language: node_js
 install:
   - npm install npm@6 --global
   - npm install
-  - npm run bootstrap
-  - npm run build
   # - npm ci
   # keep the npm cache around to speed up installs
 cache:
@@ -12,6 +10,8 @@ cache:
 node_js:
   - 8
 script:
+  - npm run bootstrap
+  - npm run build
   - npm run lint
   - npm run test
   - cd smoketest