Fix: deal with feeds that don't have the updated property

Author: kevinrenskers

example/uv.lock

@@ -1,6 +1,6 @@
 [project]
 name = "django-rss-filter"
-version = "0.3.0"
+version = "0.4.0"
 description = "Filter public RSS feeds, remove articles that contain certain keywords or categories."
 authors = [
     {name = "Kevin Renskers", email = "[email protected]"},

pyproject.toml

@@ -21,7 +21,12 @@ def filter_feed(feed_body: str, filtered_words: str, filtered_categories: str) -
     fg.link(href=feed.feed.link)
     fg.description(feed.feed.get("description", "Filtered feed"))
     fg.language(feed.feed.get("language", "en"))
-    fg.updated(feed.feed.updated)
+
+    if updated := feed.feed.get("updated"):
+        fg.updated(updated)
+
+    if published := feed.feed.get("published"):
+        fg.pubDate(published)
 
     filtered_words_list = [item.strip().lower() for item in filtered_words.split(",") if item.strip()]
     filtered_categories_list = [item.strip().lower() for item in filtered_categories.split(",") if item.strip()]