fix out-of-date eslint dependency

Author: sanfilip

package.json

@@ -34,7 +34,7 @@
   },
   "devDependencies": {
     "docdash": "^0.4.0",
-    "eslint": "3.2.2",
+    "eslint": "3.19.0",
     "jsdoc": "^3.4.0",
     "prettier": "^1.3.1",
     "repl": "0.1.3",