downgrade airbnb config to ensure compaibility with eslint.

Author: LinusBorg

template/package.json

@@ -45,7 +45,7 @@
     "eslint-plugin-node": "^5.2.0",
     {{/if_eq}}
     {{#if_eq lintConfig "airbnb"}}
-    "eslint-config-airbnb-base": "^12.0.1",
+    "eslint-config-airbnb-base": "^11.3.0",
     "eslint-import-resolver-webpack": "^0.8.3",
     "eslint-plugin-import": "^2.7.0",
     {{/if_eq}}