Make sure the CI install is equal to the local one

Vinnl · Vinnl · commit c8f4be1a6d42 · 2019-06-10T12:08:09.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 install:
-  - npm install
+  - npm ci
 script:
   - npm test
   # Make sure it still builds successfully - the build isn't actually used yet:
