.travis.yml: Added instructions to use npm 3

AurelioDeRosa · AurelioDeRosa · commit e564dd1d5dd8 · 2016-01-24T03:09:38.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -13,6 +13,9 @@ cache:
   directories:
     - node_modules
 
+before_install:
+  - npm i -g npm@^3.3.0
+
 script:
   - gulp lint
   - gulp test:ci
