ci: Update GitHub workflows

Author: blocknotes

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ['3.0', '3.1', '3.2']
+        ruby: ['3.0', '3.1', '3.2', '3.3', '3.4', '4.0']
 
     steps:
       - name: Checkout repository

.rubocop.yml

@@ -2,7 +2,7 @@
 inherit_from:
   - https://relaxed.ruby.style/rubocop.yml
 
-require:
+plugins:
   - rubocop-packaging
   - rubocop-performance
   - rubocop-rspec
@@ -26,9 +26,6 @@ Lint/UnusedMethodArgument:
 RSpec/ExampleLength:
   Max: 20
 
-RSpec/Rails/InferredSpecType:
-  Enabled: false
-
 Style/ExplicitBlockArgument:
   Enabled: false