chore(deps): update dependency minitest to v6

Author: renovate-bot

Gemfile

@@ -6,7 +6,7 @@ gemspec
 ar_version = ENV.fetch("AR_VERSION", "~> 7.1.0")
 gem "activerecord", ar_version
 gem "ostruct"
-gem "minitest", "~> 5.27.0"
+gem "minitest", "~> 6.0.0"
 gem "minitest-rg", "~> 5.4.0"
 gem "pry", "~> 0.14.2"
 gem "pry-byebug", "~> 3.11.0"