Update to eslint-config-airbnb-base v11.3.1

Also includes an update to `eslint-plugin-import@^2.7.0` to satisfy the
`peerDependencies` of `eslint-config-airbnb-base`.

Author: Arcanemagus

package.json

@@ -51,8 +51,8 @@
   },
   "devDependencies": {
     "eslint": "^4.3.0",
-    "eslint-config-airbnb-base": "^11.1.0",
-    "eslint-plugin-import": "^2.2.0"
+    "eslint-config-airbnb-base": "^11.3.1",
+    "eslint-plugin-import": "^2.7.0"
   },
   "eslintConfig": {
     "rules": {