update eslint

Author: ecarriou

.eslintrc

@@ -52,6 +52,12 @@
         "indent": 0,
         "newline-per-chained-call": 0
       }
+    },
+    {
+      "files": ["Gruntfile.js"],
+      "rules": {
+        "camelcase": 0
+      }
     }
   ]
 }