Downgrade eslint to 2.7.0

package.json

@@ -17,7 +17,7 @@
     "babel-preset-es2015": "^6.3.13",
     "chai": "^3.4.1",
     "docxtemplater": "^2.1.0",
-    "eslint": "^3.0.1",
+    "eslint": "^2.7.0",
     "mocha": "^2.4.5"
   },
   "repository": {