Added CSV export of subscribers

Fixed some bugs in subscriptions
Updated some packages to avoid warnings about vulnerabilities
Completed RSS feed campaigns

lib/entity-settings.js

@@ -29,6 +29,10 @@ const entityTypes = {
         entitiesTable: 'campaigns',
         sharesTable: 'shares_campaign',
         permissionsTable: 'permissions_campaign',
+        dependentPermissions: {
+            extraColumns: ['parent'],
+            getParent: entity => entity.parent
+        },
         files: {
             file: {
                 table: 'files_campaign_file',