test: Update to node 7

tmcw · tmcw · commit ad8dc3e20ffb · 2017-05-08T19:44:29.000-04:00
diff --git a/circle.yml b/circle.yml
@@ -1,6 +1,6 @@
 machine:
   node:
-    version: 6
+    version: 7
 test:
   override:
     - npm run test-ci
