Only run lint on node 12

.travis.yml

@@ -1,9 +1,15 @@
 language: node_js
 node_js:
-  - '8'
-  - '10'
-  - '12'
+  - 8
+  - 10
+  - 12
   - 'node'
 
-script: 'npm install && npm run ci'
+matrix:
+  include:
+    - name: Lint
+      node_js: 12
+      script: npm run lint
+
+script: 'npm install && npm run test:ci'
 after_success: '<coverage/lcov.info ./node_modules/coveralls/bin/coveralls.js'

package.json

@@ -26,7 +26,7 @@
   "scripts": {
     "lint": "eslint . && prettier --check '**/*.js'",
     "test": "mocha",
-    "ci": "npm test && npm run lint && npm run coverage",
+    "test:ci": "npm test && npm run lint && npm run coverage",
     "coverage": "NODE_ENV=development nyc --reporter=lcov --reporter=text --all -- npm test && echo google-chrome coverage/lcov-report/index.html"
   },
   "repository": {