refactor: Updated the 2018 idiom lint to the 2021_compatibility lint

src/handlers/radarr_handlers/indexers/edit_indexer_handler.rs

@@ -19,7 +19,7 @@ pub(super) struct EditIndexerHandler<'a, 'b> {
   _context: Option<ActiveRadarrBlock>,
 }
 
-impl<'a, 'b> EditIndexerHandler<'a, 'b> {
+impl EditIndexerHandler<'_, '_> {
   fn build_edit_indexer_params(&mut self) -> EditIndexerParams {
     let edit_indexer_modal = self
       .app

src/handlers/radarr_handlers/indexers/edit_indexer_settings_handler.rs

@@ -20,7 +20,7 @@ pub(super) struct IndexerSettingsHandler<'a, 'b> {
   _context: Option<ActiveRadarrBlock>,
 }
 
-impl<'a, 'b> IndexerSettingsHandler<'a, 'b> {
+impl IndexerSettingsHandler<'_, '_> {
   fn build_edit_indexer_settings_body(&mut self) -> IndexerSettings {
     self
       .app

src/handlers/radarr_handlers/indexers/mod.rs

@@ -31,7 +31,7 @@ pub(super) struct IndexersHandler<'a, 'b> {
   context: Option<ActiveRadarrBlock>,
 }
 
-impl<'a, 'b> IndexersHandler<'a, 'b> {
+impl IndexersHandler<'_, '_> {
   handle_table_events!(self, indexers, self.app.data.radarr_data.indexers, Indexer);
 
   fn extract_indexer_id(&self) -> i64 {

src/handlers/radarr_handlers/indexers/test_all_indexers_handler.rs

@@ -17,7 +17,7 @@ pub(super) struct TestAllIndexersHandler<'a, 'b> {
   _context: Option<ActiveRadarrBlock>,
 }
 
-impl<'a, 'b> TestAllIndexersHandler<'a, 'b> {
+impl TestAllIndexersHandler<'_, '_> {
   handle_table_events!(
     self,
     indexer_test_all_results,