Issue #3507476: Allow Lists of Strings in GraphQL views

Closes #3507476

modules/graphql_compose_views/src/Plugin/GraphQLCompose/SchemaType/View.php

@@ -421,6 +421,9 @@ class View extends GraphQLComposeSchemaTypeBase {
 
         $type_fields[$field_alias] = $custom_scalar;
       }
+      elseif ($field_type == 'List String') {
+        $type_fields[$field_alias] = Type::listOf(Type::string());
+      }
       else {
         $type_fields[$field_alias] = call_user_func([
           Type::class,