Add teaser taxonomy term feed

where we try to optimize for Drupal Planet while still getting all
our unique coolness (multiple authors, permalink guid) accounted for.

config/sync/views.view.taxonomy_term.yml

@@ -4,6 +4,7 @@ status: true
 dependencies:
   config:
     - core.entity_view_mode.node.rss
+    - core.entity_view_mode.node.rss_teaser
     - core.entity_view_mode.node.teaser
     - field.storage.node.field_authors
     - field.storage.node.field_body_paragraph
@@ -266,8 +267,8 @@ display:
         - user.permissions
       max-age: -1
       tags: {  }
-  feed_1:
-    id: feed_1
+  feed:
+    id: feed
     display_title: Feed
     display_plugin: feed
     position: 2
@@ -278,7 +279,7 @@ display:
       pager:
         type: some
         options:
-          items_per_page: 10
+          items_per_page: 12
           offset: 0
       path: taxonomy/term/%/feed
       displays:
@@ -697,6 +698,34 @@ display:
       tags:
         - 'config:field.storage.node.field_authors'
         - 'config:field.storage.node.field_body_paragraph'
+  feed_teasers:
+    display_plugin: feed
+    id: feed_teasers
+    display_title: 'Teaser feed'
+    position: 3
+    display_options:
+      display_extenders: {  }
+      row:
+        type: node_rss
+        options:
+          relationship: none
+          view_mode: rss_teaser
+      display_description: ''
+      path: taxonomy/term/%/teasers/feed
+      pager:
+        type: some
+        options:
+          items_per_page: 24
+          offset: 0
+    cache_metadata:
+      max-age: -1
+      contexts:
+        - 'languages:language_content'
+        - 'languages:language_interface'
+        - url
+        - 'user.node_grants:view'
+        - user.permissions
+      tags: {  }
   page_1:
     id: page_1
     display_title: Page