Update test-kitchen requirement from ~> 1.2 to ~> 2.5

Updates the requirements on [test-kitchen](https://github.com/test-kitchen/test-kitchen) to permit the latest version.
- [Release notes](https://github.com/test-kitchen/test-kitchen/releases)
- [Changelog](https://github.com/test-kitchen/test-kitchen/blob/master/CHANGELOG.md)
- [Commits](https://github.com/test-kitchen/test-kitchen/compare/v1.2.0...v2.5.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index ae91501..03c8fd9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ gemspec
 group :development_extras do
   gem "chefstyle"
   gem "reek"
-  gem "test-kitchen", "~> 1.2"
+  gem "test-kitchen", "~> 2.5"
   gem "kitchen-digitalocean"
   gem "kitchen-ec2"
   gem "kitchen-vagrant"