Add build badge and fix lint script

Author: PeachScript

README.md

@@ -1,5 +1,6 @@
 <p align="center"><img width="200" src="./doc/logo.png"></p>
 <p align="center">
+  <a href="https://travis-ci.org/PeachScript/vue-infinite-loading"><img src="https://img.shields.io/travis/PeachScript/vue-infinite-loading/master.svg"></a>
   <a href="https://www.npmjs.com/package/vue-infinite-loading"><img src="https://img.shields.io/npm/v/vue-infinite-loading.svg"></a>
   <a href="https://www.npmjs.com/package/vue-infinite-loading"><img src="https://img.shields.io/npm/l/vue-infinite-loading.svg"></a>
   <a href="https://david-dm.org/PeachScript/vue-infinite-loading?type=dev"><img src="https://img.shields.io/david/dev/PeachScript/vue-infinite-loading.svg"></a>

package.json

@@ -11,7 +11,7 @@
     "dev": "webpack-dev-server --inline --hot --quiet --port=8000",
     "build": "rm -rf build/ && NODE_ENV=production webpack --progress --hide-modules",
     "test": "karma start --single-run",
-    "lint": "eslint ./src/**/*.vue ./src/**/*.js"
+    "lint": "eslint './src/**(vue|js)'"
   },
   "keywords": [
     "vue",