Update guides sort order

lib/guide.js

@@ -3,7 +3,12 @@ import authors from "data/authors";
 import siteConfig from "data/site";
 
 export const getAllGuides = () => {
-  return guides;
+  return guides.filter(guide => !guide.draft)
+    .sort((a, b) => new Date(b.updatedAt) - new Date(a.updatedAt));
+};
+
+export const getFeaturedGuides = () => {
+  return getAllGuides().filter(guide => guide.featured);
 };
 
 export const getRequestedGuide = req => {