ci: Reduce node version on CircleCI to 4

tmcw · tmcw · commit 6a8a3f6310cf · 2017-08-12T14:25:34.000-07:00
diff --git a/circle.yml b/circle.yml
@@ -1,6 +1,6 @@
 machine:
   node:
-    version: 7
+    version: 4
 test:
   override:
     - npm run test-ci
