More developer friendly to use npm test

Author: paazmaya

.travis.yml

@@ -3,7 +3,7 @@ language: node_js
 node_js:
   - "10"
 script:
-  - npx grunt
+  - npm test
 cache:
   directories:
     - node_modules

package.json

@@ -10,7 +10,7 @@
   "scripts": {
     "prepack": "grunt build",
     "build": "grunt build",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "grunt eslint"
   },
   "engines": {
     "node": ">=6"