chore(package): update eslint to version 4.7.0

Closes #14

Author: greenkeeper[bot]

package.json

@@ -37,7 +37,7 @@
     "@satazor/eslint-config": "^3.0.0",
     "chai": "^4.0.2",
     "coveralls": "^2.11.6",
-    "eslint": "^3.0.0",
+    "eslint": "^4.7.0",
     "istanbul": "^0.4.1",
     "lodash": "^4.15.0",
     "mocha": "^3.0.0",