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: 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
   file:
-    - "unist-util-assert.js"
-    - "unist-util-assert.min.js"
+    - 'unist-util-assert.js'
+    - 'unist-util-assert.min.js'
   on:
     tags: true