Update babel-eslint + eslint

package.json

@@ -20,10 +20,11 @@
   },
   "devDependencies": {
     "babel-core": "5.8.3",
-    "babel-eslint": "3.1.26",
+    "babel-eslint": "4.0.5",
     "babel-loader": "5.3.2",
     "chai": "3.0.0",
     "cog": "git://github.com/muffinresearch/cog.git#87e7c4f3",
+    "eslint": "0.24.1",
     "eslint-plugin-react": "3.0.0",
     "grunt": "0.4.5",
     "grunt-concurrent": "2.0.0",

public/.eslintrc

@@ -1,7 +1,7 @@
 {
   "env": {
     "browser": true,
-    "es6": "true",
+    "es6": true,
   },
   "rules": {
     "global-strict": 0,