chore(package): update babel-eslint to version 8.1.0

Closes #14

Author: greenkeeper[bot]

package.json

@@ -52,7 +52,7 @@
     "ava": "^0.18.1",
     "babel-cli": "^6.16.0",
     "babel-core": "^6.17.0",
-    "babel-eslint": "^7.0.0",
+    "babel-eslint": "^8.1.0",
     "babel-polyfill": "^6.16.0",
     "babel-preset-es2015": "^6.16.0",
     "babel-preset-stage-2": "^6.16.0",