chore(project): tests on node 12 (#106)

Author: gergelyke

.travis.yml

@@ -7,7 +7,7 @@ notifications:
 node_js:
   - '8'
   - '10'
-  - '10'
+  - '12'
 
 # https://github.com/greenkeeperio/greenkeeper-lockfile#npm
 before_install:

example/mongo/index.js

@@ -13,7 +13,7 @@ app.get('/', async (req, res) => {
 })
 
 function onHealthCheck () {
-  return db.command({ping: 1})
+  return db.command({ ping: 1 })
 }
 
 function onSignal () {