Removed node v4 by accident

sondr3 · sondr3 · commit b7103007493d · 2016-05-23T22:22:34.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,5 +3,6 @@ sudo: false
 node_js:
   - "6"
   - "5"
+  - "4"
 after_success:
     - './node_modules/.bin/nyc report --reporter=text-lcov | ./node_modules/.bin/coveralls' - "4"
