chore(package): update eslint to version 4.7.2

Closes #13

Author: greenkeeper[bot]

package.json

@@ -42,7 +42,7 @@
     "babel-plugin-transform-es2015-modules-commonjs": "^6.14.0",
     "babel-register": "^6.14.0",
     "codecov.io": "^0.1.6",
-    "eslint": "^3.2.2",
+    "eslint": "^4.7.2",
     "eslint-config-ngryman": "^1.4.0",
     "nyc": "^10.0.0",
     "pre-commit": "^1.1.3",