chore: Add node 10 to Travis (#306)

Author: juanjoDiaz

Diff for: .travis.yml

@@ -6,6 +6,7 @@ node_js:
   - "7"
   - "8"
   - "9"
+  - "10"
 script:
   - "npm run lint"
   - "npm run test-with-coverage"

Diff for: test/CLI.js

@@ -726,7 +726,7 @@ module.exports = (testRunner, jsonFixtures, csvFixtures) => {
 
   // Pretty print
   // TODO Fix this tests in Node < 8
-  if (Number(process.versions.node[0]) < 8) return;
+  if (parseFloat(process.versions.node) < 8) return;
 
   testRunner.add('should print pretty table', (t) => {
     const opts = ' --pretty';