build: use npm ci

diff --git a/.travis.yml b/.travis.yml
index 8703a2fb4b5fd8d250788d380554e80dfc48f237..db080ead20521fd459bbfc51f5489ebf8bfbce78 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,8 @@ matrix:
   - node_js: "stable"
     env: ZF_TRAVIS_COMMAND=test:javascript:browserstack
 
-install: npm install
+before_install:  npm install -g npm@latest
+install: npm ci
 script: npm run $ZF_TRAVIS_COMMAND
 
 notifications: