Update Node in Travis

Author: wooorm

.travis.yml

@@ -1,15 +1,15 @@
 language: node_js
 node_js:
-- lts/boron
-- node
+  - lts/dubnium
+  - node
 after_script: bash <(curl -s https://codecov.io/bash)
 deploy:
   provider: releases
   skip_cleanup: true
   api_key:
     secure: bc/mWTXNG9ffRJcixXTjOiVgxcpDijMgLGaph2kOUZtzmAeKZIViaqxjVIbISodQWJPM4JiROEa2Tou3j0gCvIvIonMOkPuXG186MHI8Wp5gGahex3orC4uiuAimiiLFbzz/jH6LAeE8CccBGecWoZh0jEb0akKWWR3R4bh0uegPIQe0tnbWaA7oR+RjUpaorfQSIETYnDUdvQUK94sA+BkEDtGom2McaPPQZW/1ecj82FQdhMqQdcVVQtq/jpypj3hZsuFJBaJDZbY1ZBBq7D5G2PXreHSTUVVISXcjvaQRxtQvnQrrW3V9mY6Ro03sEnk39QAONz6IPc9C3VKBabLa2Og0CKRFmgVNiZJ+axrbPh457ARAgH0Q9W3oqEuYgsuVQEDDZBWlvjkr0RL7daKJLacGAeLw0mETewonv6ODt+ZWsWnc10Lg8y0TrKGUb+pJmqJ8YX9ytTdiPkADkm9g/2xUky7WRu69xvZN3k/wSRmCnNN4v9yAIfGc9qhYFISVo6NUjMWxCkfcpB2up2pCuTonP8aamhVPuwbBU8T+04vYLZ1n/Va8yMKmBNx+2o93n5XyD0R3Z1HVIWJE9l5CCuJKYzynMUEE3Q5Ycn2KbDKrS/5ozifbH3gB1ZjC12YlO+NZqek6upiDqfWcB4njtdqMkEVDwMUcLD2DEHU=
   file:
-    - "unist-util-generated.js"
-    - "unist-util-generated.min.js"
+    - 'unist-util-generated.js'
+    - 'unist-util-generated.min.js'
   on:
     tags: true