Update eslint-config-airbnb-base to version 9.0.0 🚀 (#146)

* chore(package): update eslint-config-airbnb-base to version 9.0.0

* chore(package): update eslint-plugin-import to version 2.0.1

* Update eslint to v3.8.0

Minimum version to satisfy the peerDependency of
`eslint-config-airbnb-base@9.0.0`.

Author: greenkeeperio-bot

package.json

@@ -52,9 +52,9 @@
     "tiny-promisify": "^0.1.1"
   },
   "devDependencies": {
-    "eslint": "^3.6.0",
-    "eslint-config-airbnb-base": "^8.0.0",
-    "eslint-plugin-import": "^1.16.0"
+    "eslint": "^3.8.0",
+    "eslint-config-airbnb-base": "^9.0.0",
+    "eslint-plugin-import": "^2.0.1"
   },
   "eslintConfig": {
     "rules": {