fix: install latest npm on travis for node 6

isaacs · isaacs · commit e0eb3cbfdbe9 · 2020-01-28T09:33:48.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,6 +6,9 @@ node_js:
   - "8"
   - "6"
 
+before_install:
+  - npm install -g npm@latest
+
 cache:
   directories:
   - $HOME/.npm
