Dependency update & remove lib directory

.gitignore

@@ -1 +1,2 @@
 node_modules
+lib/

.travis.yml

@@ -2,7 +2,8 @@ sudo: false
 language: node_js
 node_js:
   - "0.12"
-  - "4.0"
+  - "4"
+  - "5"
 script: npm run travis
 
 before_install:

package.json

@@ -7,7 +7,7 @@
     "lint": "standard src test",
     "build": "babel --out-dir lib src",
     "autotest": "chokidar src test -c 'npm test'",
-    "test": "mocha --compilers js:babel/register",
+    "test": "mocha --compilers js:babel-core/register",
     "posttest": "npm run lint && npm run build",
     "travis": "npm run test",
     "prepublish": "npm run build"
@@ -28,13 +28,20 @@
   },
   "homepage": "https://github.com/css-modules/postcss-modules-constants#readme",
   "devDependencies": {
-    "babel": "^5.8.23",
-    "chokidar": "^1.2.0",
-    "mocha": "^2.3.3",
-    "standard": "^5.3.1"
+    "babel-cli": "^6.4.5",
+    "babel-core": "^6.4.5",
+    "babel-preset-es2015": "^6.3.13",
+    "chokidar": "^1.4.2",
+    "mocha": "^2.4.4",
+    "standard": "^5.4.1"
   },
   "dependencies": {
     "icss-replace-symbols": "^1.0.2",
-    "postcss": "^5.0.10"
+    "postcss": "^5.0.14"
+  },
+  "babel": {
+    "presets": [
+      "es2015"
+    ]
   }
 }