chore(package): update eslint to version 4.4.0

Closes #12

Author: greenkeeper[bot]

package.json

@@ -61,7 +61,7 @@
     "chai": "^3.5.0",
     "coveralls": "^2.11.14",
     "es6-promisify": "^5.0.0",
-    "eslint": "^3.7.0",
+    "eslint": "^4.4.0",
     "eslint-config-andy": "github:jedwards1211/eslint-config-andy#2.0.0-beta7",
     "eslint-watch": "^3.0.0",
     "flow-bin": "^0.41.0",