autofix: fixes from CI

Author: benjie

.cachedValidUrls.json

@@ -212,6 +212,7 @@
   "https://github.com/visionmedia/debug",
   "https://github.com/zombodb/zombodb",
   "https://gitter.im/graphile/postgraphile",
+  "https://grafast.org",
   "https://graphql-code-generator.com/",
   "https://graphql-code-generator.com/docs/plugins/index/",
   "https://graphql.github.io/graphql-spec/October2016/",