Update npm to ^6.4.0

drewpc · drewpc · commit f8d4ec2fa625 · 2019-04-22T15:17:21.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,7 @@ node_js:
   - "7"
   - "6"
 before_install:
-  - npm install -g npm@latest
+  - npm install -g 'npm@^6.4.0'
 before_script:
   - npm run lint
   - npm run build
