release: fixes

### Fixes 
- Particular RSS XML Feed showed as invalid if you select Post author to be shown in the backend
- Add default feed values if they are empty
- Fix source name when author unavailable in Gutenberg block
- Change 2nd-time validation message when author empty
- Fix broken style issue in feedzy list page
- Fix fewer columns issue in Gutenberg block
- Fix broken dropdown style issue in admin

composer.json

@@ -1,6 +1,6 @@
 {
   "name": "codeinwp/feedzy-rss-feeds",
-  "description": "Feedzy RSS feedzy for WordPress.",
+  "description": "Feedzy RSS feeds for WordPress.",
   "keywords": [
     "wordpress",
     "feeds",