Improve error handling and parsing a little

pubspec.lock

@@ -49,14 +49,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.8"
-  dart_rss:
-    dependency: "direct main"
-    description:
-      name: dart_rss
-      sha256: "73539d4b7153b47beef8b51763ca55dcb6fc0bb412b29e0f5e74e93fabfd1ac6"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.0.3"
   fake_async:
     dependency: transitive
     description:
@@ -107,14 +99,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.1.2"
-  intl:
-    dependency: transitive
-    description:
-      name: intl
-      sha256: d6f56758b7d3014a48af9701c085700aac781a92a87a62b1333b46d8879661cf
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.19.0"
   leak_tracker:
     dependency: transitive
     description:
@@ -179,14 +163,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
-  petitparser:
-    dependency: transitive
-    description:
-      name: petitparser
-      sha256: "07c8f0b1913bcde1ff0d26e57ace2f3012ccbf2b204e070290dad3bb22797646"
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.1.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -304,14 +280,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.0"
-  xml:
-    dependency: transitive
-    description:
-      name: xml
-      sha256: b015a8ad1c488f66851d762d3090a21c600e479dc75e68328c52774040cf9226
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.5.0"
 sdks:
   dart: ">=3.7.0 <4.0.0"
   flutter: ">=3.18.0-18.0.pre.54"