CI: use lts instead of latest Node

Author: cwillisf

.travis.yml

@@ -1,8 +1,8 @@
 language: node_js
 dist: trusty
 node_js:
-- 10
-- node
+- 12
+- lts/*
 env:
   global:
     - NODE_ENV=production
@@ -20,7 +20,7 @@ jobs:
   include:
     - stage: test
     - stage: deploy
-      node_js: 10
+      node_js: 12
       script: npm run build
       before_deploy:
       - >