Update Node in Travis

wooorm · wooorm · commit 364bbcc4a1cf · 2018-05-10T11:09:00.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: node_js
 node_js:
-- '4.0'
-- '9.0'
+- lts/boron
+- node
 after_script: bash <(curl -s https://codecov.io/bash)
