Adding eslint to lint js files

.eslintrc.json

@@ -0,0 +1,13 @@
+{
+  "plugins": [
+    "eslint-plugin-github"
+  ],
+  "env": {
+    "es6": true,
+    "node": true
+  },
+  "extends": [
+      "plugin:github/recommended",
+      "plugin:github/es6"
+  ]
+}

__tests__/index.js

@@ -1,8 +1,8 @@
-import config from "../"
-import stylelint from "stylelint"
-import test from "ava"
+const config = require("../")
+const stylelint = require("stylelint")
+const test = require("ava")
 
-const validCss = (
+const validCss =
 `@import "x.css";
 @import "y.css";
 
@@ -70,13 +70,13 @@ const validCss = (
     background-image: url("x.svg");
   }
 }
-`)
+`
 
-const invalidCss = (
+const invalidCss =
 `a {
   top: .2em;
 }
-`)
+`
 
 test("no warnings with valid css", t => {
   return stylelint.lint({

package.json

@@ -5,7 +5,8 @@
   "main": "index.js",
   "scripts": {
     "ava": "ava --verbose \"__tests__/**/*.js\"",
-    "test": "npm run ava"
+    "lint": "eslint **/*.js",
+    "test": "npm run lint && npm run ava"
   },
   "repository": {
     "type": "git",
@@ -30,6 +31,8 @@
   },
   "devDependencies": {
     "ava": "^0.15.2",
+    "eslint": "^3.0.1",
+    "eslint-plugin-github": "^0.4.0",
     "stylelint": "^6.6.0"
   }
 }