chore: test node v7; drop v4

gajus · gajus · commit 62dd34862844 · 2016-11-28T12:12:43.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -1,11 +1,10 @@
 language: node_js
 node_js:
+  - 7
   - 6
   - 5
-  - 4
 before_install:
   - npm config set depth 0
-  - npm install --global npm@3
 notifications:
   email: false
 sudo: false
