Bump minitest from 5.18.1 to 5.19.0

Bumps [minitest](https://github.com/minitest/minitest) from 5.18.1 to 5.19.0.
- [Changelog](https://github.com/minitest/minitest/blob/master/History.rdoc)
- [Commits](minitest/minitest@v5.18.1...v5.19.0)

---
updated-dependencies:
- dependency-name: minitest
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -15,7 +15,7 @@ group :development, :install do
 end
 
 group :development, :test do
-  gem 'minitest', '~> 5.18'
+  gem 'minitest', '~> 5.19'
   gem 'rake', '~> 13.0'
 end
 

Gemfile.lock

@@ -13,7 +13,7 @@ GEM
     commonmarker (0.23.9)
     docopt (0.6.1)
     json (2.6.3)
-    minitest (5.18.1)
+    minitest (5.19.0)
     paint (2.3.0)
     parallel (1.22.1)
     parser (3.2.2.0)
@@ -47,7 +47,7 @@ DEPENDENCIES
   bundler (~> 2.1)
   commonmarker (~> 0.23)
   docopt (~> 0.6)
-  minitest (~> 5.18)
+  minitest (~> 5.19)
   paint (~> 2.3)
   rake (~> 13.0)
   rubocop (~> 1.50)