CI: Test with Ruby 4.0

Until released needs solidus_auth_devise main branch for now

Author: AlistairNorman

.github/workflows/test_solidus.yml

@@ -38,8 +38,8 @@ jobs:
             database: sqlite
             storage: activestorage
           - rails: "8.1"
-            ruby: "3.4"
-            database: sqlite
+            ruby: "4.0"
+            database: postgres
             storage: activestorage
     env:
       BUNDLE_WITHOUT: "lint release"

bin/rails-application-template

@@ -18,7 +18,7 @@ if $0 == __FILE__
 end
 
 gem 'solidus'
-gem 'solidus_auth_devise'
+gem 'solidus_auth_devise', github: 'solidusio/solidus_auth_devise', branch: 'main'
 gem 'rails_12factor'
 
 gem_group :heroku do