chore(package): update babel-eslint to version 8.1.1

Closes #18

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "yargs": "^7.0.1"
   },
   "devDependencies": {
-    "babel-eslint": "^7.1.1",
+    "babel-eslint": "^8.1.1",
     "enzyme": "^2.7.0",
     "eslint": "^3.12.2",
     "eslint-config-airbnb-base": "^11.0.0",