upgrade to ESLint v2.x

http://eslint.org/blog/2016/02/eslint-v2.0.0-released
http://eslint.org/docs/user-guide/configuring

package.json

@@ -5,7 +5,7 @@
   "repository": "shinnn/empty-file-callback",
   "author": "Shinnosuke Watanabe <snnskwtnb@gmail.com> (https://github.com/shinnn)",
   "scripts": {
-    "pretest": "eslint --config @shinnn/node-legacy index.js test.js",
+    "pretest": "eslint --fix --config @shinnn/node-legacy index.js test.js",
     "test": "node --strong_mode --harmony_destructuring test.js",
     "coverage": "node --strong_mode --harmony_destructuring node_modules/.bin/istanbul cover test.js"
   },
@@ -27,14 +27,14 @@
     "empty"
   ],
   "dependencies": {
-    "graceful-fs": "^4.1.2",
-    "is-obj": "^1.0.0"
+    "graceful-fs": "^4.1.3",
+    "is-obj": "^1.0.1"
   },
   "devDependencies": {
-    "@shinnn/eslint-config-node-legacy": "^1.0.0",
-    "eslint": "^1.7.3",
-    "istanbul": "^0.4.0",
-    "pify": "^2.2.0",
-    "tape": "^4.2.2"
+    "@shinnn/eslint-config-node-legacy": "^2.0.0",
+    "eslint": "^2.7.0",
+    "istanbul": "^0.4.3",
+    "pify": "^2.3.0",
+    "tape": "^4.5.1"
   }
 }