Update minitest to 6.0 (#548)

Change-Id: Ia51c28eec441fb4cfa03ad8ab5e34990d8f87784

Author: dorasun

CHANGELOG.md

@@ -1,3 +1,7 @@
+40.0.0
+-----
+- Updated minitest to 6.0.
+
 40.0.0
 -----
 - Compatibility with v24 of the API: https://developers.google.com/google-ads/api/docs/release-notes

google-ads-googleads.gemspec

@@ -40,5 +40,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'bundler', '~> 4.0'
   s.add_development_dependency 'rake', '~> 13.0'
 
-  s.add_development_dependency 'minitest', '~> 5.10'
+  s.add_development_dependency 'minitest', '~> 6.0'
 end

lib/google/ads/google_ads/version.rb

@@ -20,7 +20,7 @@ module Google
   module Ads
     module GoogleAds
       CLIENT_LIB_NAME = 'gccl'.freeze
-      CLIENT_LIB_VERSION = '40.0.0'.freeze
+      CLIENT_LIB_VERSION = '40.1.0'.freeze
       VERSION = CLIENT_LIB_VERSION
     end
   end

test/test_config.rb

@@ -86,7 +86,7 @@ def test_use_cloud_org_for_api_access()
     assert_equal(refresh_token_value, config.refresh_token)
     assert_equal(client_id_value, config.client_id)
     assert_equal(client_secret_value, config.client_secret)
-    assert_equal(nil, config.developer_token)
+    assert_nil(config.developer_token)
     assert_equal(true, config.use_cloud_org_for_api_access)
   end
 end